Labelling

Adequate labelling of solutions that will be stored in the science or chemistry classroom.

Chemicals That Need to be Labelled

New chemicals ordered from a supplier are already labelled in accordance with regulations. However, solutions that are made locally also require labelling. As a minimum, the label should contain the name and concentration of the solution, and sufficient hazard information to ensure proper use. For solutions that will be stored for some time or used in the classroom, it is recommended to label them with hazard information similar to that which is found on labels made according to the CLP regulation. Old chemicals that do not have a CLP label need to be relabelled.

Template: Routines for labelling chemicals (Word)

Further reading: Legislation for Classification and Labelling of Chemicals

Making a Label for a Solution

A label should include the following elements:

Product identifier (name and identification number)
Chemical formulae and concentration
Hazard information
- Hazard pictogram(s)
- Signal word
- Hazard statement(s)
- Precautionary statement(s)
Information about who made the solution and when it was made

Product Identifier

Chemical products have a chemical name and an identification number, such as the CAS number. This information is called the product identifier. The product identifier can be found in the Classification and Labelling Inventory, on the container of the original product from the supplier, and in the safety data sheet. If the solvent is something other than water, the chemical name of the solvent should be included in the title or in a subtitle.

Chemical Formulae and Concentration

The chemical formula and the concentration of the dissolved substance should be given on the label. Concentration is usually given in percent or mol/L.

Hazard Information

Hazard information includes hazard pictogram(s), signal word, hazard statement(s) and precautionary statement(s). The hazard information should be kept together on the label. If there are no hazard classes assigned to the solution, the label should read “Not subject to classification”. If a solution contains other solvents than water, or more than one substance, the label must also include the hazard information for these substances.

Information About Who Made the Solution

For solutions made in school, the label should include the date of production and the name of the person who made the solution.

Hazard Information on Common Chemicals

The list of chemicals below contains hazard information on some common solutions used in chemistry education. The hazard information depends on the concentration of the solution, so make sure to choose the right concentration interval.

If the substance is not in the list below, try to find a safety data sheet for a solution with the same substance and concentration. Use the hazard pictogram(s), signal word and hazard statements in the safety data sheet on the label. Choose the precautionary statements that are relevant to how the solution will be used in the classroom. If a safety data sheet with the right concentration is not available, use a safety data sheet for a more concentrated solution or for the pure substance. In this case, this may over classify the solution. However, better safe than sorry.

The CheSSE Label Generator

The label generator generates labels with the appropriate label elements. These are based on harmonized classification and may differ slightly from information in safety data sheets from different suppliers.

When clicking on a chemical in the list, the classification for different concentration intervals is shown. It is then possible to generate a label by clicking “generate label” for the right concentration interval. The generated label can be copied and pasted for example into a textbox in a Word document. In this way it is possible to print several labels on the same page.

Acetic acid, CH₃COOH CAS number 64-19-7

Labelling Suggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
17.4 M > C ≥ 13.3 M 100 % > C ≥ 80 % Generate label		Danger	Flammable liquid and vapour. Causes severe skin burns and eye damage.	Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. Wear eye protection. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water (or shower). IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor.
13.3 M > C ≥ 4.1 M 80 % > C ≥ 25 % Generate label		Danger	Causes severe skin burns and eye damage.	Wear eye protection. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water (or shower). IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor.
4.1 M > C ≥ 1.6 M 25 % > C ≥ 10 % Generate label		Warning	Causes skin irritation. Causes serious eye irritation.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention.
C < 1.6 M C < 10 % Generate label	Not classified as a harmful mixture

Storage and Waste disposal
Storage	Cabinet: Acids Store below eye level. Concentrations above 80 % should be stored in the cabinet with flamable substances.
Waste Disposal	Hazardous waste concentration limit: 1 % Container: Acidic solutions

Ammonium chloride, NH₄Cl CAS number 12125-02-9

Labelling Suggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
C ≥ 4.6 M C ≥ 25 % Generate label		Warning	Harmful if swallowed. Causes serious eye irritation.	Wash hands thoroughly after handling. Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention.
4.6 M > C ≥ 1.8 M 25 % > C ≥ 10 % Generate label		Warning	Causes serious eye irritation.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention.
C < 1.8 M C < 10 % Generate label	Not classified as a harmful mixture

Storage and waste disposal
Storage	Cabinet: Toxic
Waste Disposal	Hazardous waste concentration limit: 20 % Container: Acidic solutions

Ammonia solution, NH₃(aq) CAS number 1336-21-6

Labelling Suggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
C ≥ 13.4 M C ≥ 25 % Generate label		Danger	Causes severe skin burns and eye damage. May cause respiratory irritation. Very toxic to aquatic life.	Wear eye protection. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water (or shower). IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor. Avoid release to the environment. Collect spillage.
13.4 M > C ≥ 2.9 M 25 % > C ≥ 5 % Generate label		Danger	Causes severe skin burns and eye damage. May cause respiratory irritation.	Wear eye protection. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water (or shower). IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor.
2.9 M > C ≥ 1.7 M 5 % > C ≥ 3 % Generate label		Danger	Causes skin irritation. Causes serious eye damage.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor.
1.7 M > C ≥ 0.58 M 3 % > C ≥ 1 % Generate label		Warning	Causes skin irritation. Causes serious eye irritation.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention.
C < 0.58 M C < 1 % Generate label	Not classified as a harmful mixture

Storage and waste disposal
Storage	Cabinet: Bases
Waste Disposal	Hazardous waste concentration limit: 1 % Container: Alkaline solutions

Barium chloride, BaCl₂ CAS number 10361-37-2

Labelling Suggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
C ≥ 1.4 M C ≥ 33 % Generate label		Danger	Toxic if swallowed. Harmful if inhaled.	Wash hands thoroughly after handling. IF SWALLOWED: Immediatly call a doctor. Avoid breathing dust/mist.
1.4 M > C ≥ 1.3 M 33 % > C ≥ 30 % Generate label		Warning	Harmful if swallowed. Harmful if inhaled.	Wash hands thoroughly after handling. Avoid breathing dust/mist.
1.3 M > C ≥ 0.2 M 30 % > C ≥ 5 % Generate label		Warning	Harmful if swallowed.	Wash hands thoroughly after handling.
C < 0.2 M C < 5 % Generate label	Not classified as a harmful mixture

Storage and Waste disposal
Storage	Cabinet: Toxic
Waste Disposal	Hazardous waste concentration limit: 5 % Container: Solutions of toxic inorganic salts

Barium nitrate, Ba(NO₃)₂ CAS number 10022-31-8

Labelling Suggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
C ≥ 1.2 M C ≥ 33 % Generate label		Danger	Toxic if swallowed. Harmful if inhaled. Causes serious eye irritation.	Wash hands thoroughly after handling. IF SWALLOWED: Immediatly call a doctor. Avoid breathing dust/mist. Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention.
1.2 M > C ≥ 1.1 M 33 % > C ≥ 30 % Generate label		Warning	Harmful if swallowed. Harmful if inhaled. Causes serious eye irritation.	Wash hands thoroughly after handling. Avoid breathing dust/mist. Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention.
1.1 M > C ≥ 0.38 M 30 % > C ≥ 10 % Generate label		Warning	Harmful if swallowed. Causes serious eye irritation.	Wash hands thoroughly after handling. Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor.
0.38 M > C ≥ 0.19 M 10 % > C ≥ 5 % Generate label		Warning	Harmful if swallowed.	Wash hands thoroughly after handling.
C < 0.19 M C < 5 % Generate label	Not classified as a harmful mixture

Storage and Waste disposal
Storage	Cabinet: Toxic Solid should be stored in cabinet: Oxidising agents.
Waste Disposal	Hazardous waste concentration limit: 5 % Container: Solutions of toxic inorganic salts

Benedict's solution

LabellingSuggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
Generate label		Warning	Causes serious eye irritation. Toxic to aquatic life with long lasting effects.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention. Avoid release to the environment. Collect spillage.

Storage and Waste disposal
Storage	Cabinet: Bases
Waste Disposal	Container: Solutions of toxic inorganic salts

Calcium hydroxide, Ca(OH)₂ CAS number 1305-62-0

Labelling Suggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
0.26 M > C ≥ 0.13 M 2 % > C ≥ 1 % Generate label		Warning	Causes serious eye irritation.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention.
C < 0.13 M C < 1 % Generate label	Not classified as a harmful mixture

Storage and Waste disposal
Storage	Cabinet: Bases Store below eye level.
Waste Disposal	Hazardous waste concentration limit: 1 % Container: Alkaline solutions

Citric acid, C₆H₈O₇ CAS number 77-92-9

LabellingSuggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
C ≥ 0.5 M C ≥ 10 % Generate label		Warning	Causes serious eye irritation.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention.
C < 0.5 M C < 10 % Generate label	Not classified as a harmful mixture

Storage and Waste disposal
Storage	Cabinet: Acids
Waste Disposal	Hazardous waste concentration limit: 20 % Container: Acidic solutions

Copper(II) chloride, CuCl₂ CAS number 7447-39-4

LabellingSuggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
C ≥ 4.09 M C ≥ 55 % Generate label		Danger	Harmful if swallowed or in contact with skin. Causes skin irritation. Causes serious eye damage. Very toxic to aquatic life with long lasting effects.	Wash hands thoroughly after handling. Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor. Avoid release to the environment. Collect spillage.
4.09 M > C ≥ 1.85 M 55 % > C ≥ 25 % Generate label		Danger	Harmful if swallowed. Causes skin irritation. Causes serious eye damage. Very toxic to aquatic life with long lasting effects.	Wash hands thoroughly after handling. Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor. Avoid release to the environment. Collect spillage.
1.85 M > C ≥ 0.74 M 25 % > C ≥ 10 % Generate label		Danger	Causes skin irritation. Causes serious eye damage. Very toxic to aquatic life with long lasting effects.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor. Avoid release to the environment. Collect spillage.
0.74 M > C ≥ 0.22 M 10 % > C ≥ 3 % Generate label		Danger	Causes serious eye damage. Very toxic to aquatic life with long lasting effects.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor. Avoid release to the environment. Collect spillage.
0.22 M > C ≥ 0.074 M 3 % > C ≥ 1 % Generate label		Warning	Causes serious eye irritation. Very toxic to aquatic life with long lasting effects.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention. Avoid release to the environment. Collect spillage.
0.074 M > C ≥ 0.018 M 1 % > C ≥ 0.25 % Generate label		Warning	Very toxic to aquatic life with long lasting effects.	Avoid release to the environment. Collect spillage.
0.018 M > C ≥ 0.0018 M 0.25 % > C ≥ 0.025 % Generate label			Toxic to aquatic life with long lasting effects.	Avoid release to the environment. Collect spillage.
0.0018 M > C ≥ 0.00018 M 0.025 % > C ≥ 0.0025 % Generate label			Harmful to aquatic life with long lasting effects.	Avoid release to the environment.
C < 0.00018 M C < 0.0025 % Generate label	Not classified as a harmful mixture

Storage and Waste disposal
Storage	Cabinet: Toxic
Waste Disposal	Hazardous waste concentration limit: 0.25 % Container: Solutions of toxic inorganic salts

Copper(II) sulfate, CuSO₄ CAS number 7758-98-7

LabellingSuggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
C ≥ 1.5 M C ≥ 25 % Generate label		Warning	Harmful if swallowed. Causes skin irritation. Causes serious eye irritation. Very toxic to aquatic life with long lasting effects.	Wash hands thoroughly after handling. Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention. Avoid release to the environment. Collect spillage.
1.5 M > C ≥ 0.5 M 25 % > C ≥ 10 % Generate label		Warning	Causes skin irritation. Causes serious eye irritation. Very toxic to aquatic life with long lasting effects.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention. Avoid release to the environment. Collect spillage.
0.5 M > C ≥ 0.15 M 10 % > C ≥ 2.5 % Generate label		Warning	Very toxic to aquatic life with long lasting effects.	Avoid release to the environment. Collect spillage.
0.15 M > C ≥ 0.015 M 2.5 % > C ≥ 0.25 % Generate label			Toxic to aquatic life with long lasting effects.	Avoid release to the environment. Collect spillage.
0.015 M > C ≥ 0.0015 M 0.25 % > C ≥ 0.025 % Generate label			Harmful to aquatic life with long lasting effects.	Avoid release to the environment.
C < 0.0015 M C < 0.025 % Generate label	Not classified as a harmful mixture

Storage and waste disposal
Storage	Cabinet: Toxic
Waste Disposal	Hazardous waste concentration limit: 0.25 % Container: Solutions of toxic inorganic salts

Fehling's solution A

LabellingSuggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
Generate label		Warning	Very toxic to aquatic life with long lasting effects.	Avoid release to the environment. Collect spillage.

Storage and Waste disposal
Storage	Cabinet: Bases
Waste Disposal	Container: Solutions of toxic inorganic salts

Fehling's solution B

LabellingSuggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
Generate label		Danger	Causes severe skin burns and eye damage.	Wear eye protection. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor.

Storage and Waste disposal
Storage	Cabinet: Bases Store below eye level.
Waste Disposal	Container: Solutions of toxic inorganic salts

Fehling's solution A + B

LabellingSuggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
Generate label		Danger	Causes severe skin burns and eye damage. Toxic to aquatic life with long lasting effects.	Wear eye protection. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor. Avoid release to the environment. Collect spillage.

Storage and Waste disposal
Storage	Cabinet: Bases Store below eye level.
Waste Disposal	Container: Solutions of toxic inorganic salts

Hydrochloric acid, HCl(aq) CAS number 7647-01-0

LabellingSuggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
C ≥ 6.8 M C ≥ 25 % Generate label		Danger	Causes severe skin burns and eye damage. May cause respiratory irritation.	Wear eye protection. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water (or shower). IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor.
6.8 M > C ≥ 2.7 M 25 % > C ≥ 10 % Generate label		Warning	Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention.
C < 2.7 M C < 10 % Generate label	Not classified as a harmful mixture

Storage and waste disposal
Storage	Cabinet: Acids Store below eye level.
Waste Disposal	Hazardous waste concentration limit: 1 % Container: Acidic solutions

Hydrogen peroxide, H₂O₂ CAS number 7722-84-1

LabellingSuggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
10 M > C ≥ 7.3 M 35 % > C ≥ 25 % Generate label		Danger	Harmful if swallowed. Causes serious eye damage.	Wash hands thoroughly after handling. Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor.
7.3 M > C ≥ 2.3 M 25 % > C ≥ 8 % Generate label		Danger	Causes serious eye damage.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor.
2.3 M > C ≥ 1.4 M 8 % > C ≥ 5 % Generate label		Warning	Causes serious eye irritation.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention.
C < 1.4 M C < 5 % Generate label	Not classified as a harmful mixture

Storage and Waste disposal
Storage	At concentrations below 50 % hydrogen peroxide can be stored in the cabinet for acids, but should preferably be stored cold in a refrigirator. Store below eye level.
Waste Disposal	Hazardous waste concentration limit: 10 % Small amounts should be reacted to completion or diluted below 10 % and then poored down the drain.

Iron(II) sulfate, FeSO₄ CAS number 7782-63-0

LabellingSuggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
C ≥ 0.9 M C ≥ 25 % Generate label		Warning	Harmful if swallowed. Causes skin irritation. Causes serious eye irritation.	Wash hands thoroughly after handling. Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention.
0.9 M > C ≥ 0.35 M 25 % > C ≥ 10 % Generate label		Warning	Causes skin irritation. Causes serious eye irritation.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention.
C < 0.35 M C < 10 % Generate label	Not classified as a harmful mixture

Storage and Waste disposal
Storage	Cabinet: Toxic
Waste Disposal	Hazardous waste concentration limit: 20 % Container: Solutions of toxic inorganic salts

Iron(III) chloride, FeCl₃ CAS number 10025-77-1

LabellingSuggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
C ≥ 0.9 M C ≥ 25 % Generate label		Danger	Harmful if swallowed. Causes severe skin burns and eye damage. Harmful to aquatic life with long lasting effects.	Wash hands thoroughly after handling. Wear eye protection. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water (or shower). IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor. Avoid release to the environment.
0.9 M > C ≥ 0.18 M 25 % > C ≥ 5 % Generate label		Danger	Causes severe skin burns and eye damage.	Wear eye protection. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water (or shower). IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor.
0.18 M > C ≥ 0.11 M 5 % > C ≥ 3 % Generate label		Danger	Causes skin irritation. Causes serious eye damage.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor.
0.11 M > C ≥ 0.036 M 3 % > C ≥ 1 % Generate label		Warning	Causes skin irritation. Causes serious eye irritation.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention.
C < 0.036 M C < 1 % Generate label	Not classified as a harmful mixture

Storage and Waste disposal
Storage	Cabinet: Toxic Store below eye level.
Waste Disposal	Hazardous waste concentration limit: 1 % Container: Solutions of toxic inorganic salts

Methyl orange solution 0.1 % CAS number 547-58-0

Labelling
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
C = 0.1 % Generate label	Not classified as a harmful mixture

Nitric acid, HNO₃ CAS number 7697-37-2

LabellingSuggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
15.8 M > C ≥ 14 M 70 % > C ≥ 65 % Generate label		Danger	May intensify fire; oxidiser. Toxic if inhaled. Causes severe skin burns and eye damage.	Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking. Keep away from clothing and other combustible materials. Avoid breathing vapours. Use only outdoors or in a well-ventilated area. IF INHALED: Remove person to fresh air and keep comfortable for breathing. Call a doctor. Wear eye protection. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water (or shower). IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor.
14 M > C ≥ 4.5 M 65 % > C ≥ 28.6 % Generate label		Danger	Toxic if inhaled. Causes severe skin burns and eye damage.	Avoid breathing vapours. Use only outdoors or in a well-ventilated area. IF INHALED: Remove person to fresh air and keep comfortable for breathing. Call a doctor. Wear eye protection. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water (or shower). IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor.
4.5 M > C ≥ 2.2 M 28.6 % > C ≥ 14.3 % Generate label		Danger	Harmful if inhaled. Causes severe skin burns and eye damage.	Avoid breathing vapours. Call a doctor if you fell unwell. Wear eye protection. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water (or shower). IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor.
2.2 M > C ≥ 0.79 M 14.3 % > C ≥ 5 % Generate label		Danger	Causes severe skin burns and eye damage.	Wear eye protection. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water (or shower). IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor.
0.79 M > C ≥ 0.47 M 5 % > C ≥ 3 % Generate label		Danger	Causes skin irritation. Causes serious eye damage.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor.
0.47 M > C ≥ 0.15 M 3 % > C ≥ 1 % Generate label		Warning	Causes skin irritation. Causes serious eye irritation.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention.
C < 0.15 M C < 1 % Generate label	Not classified as a harmful mixture

Storage and waste disposal
Storage	Cabinet: Acids Nitric acid with C ≥ 65 % should be stored in cabinet: Oxidising agents. Store below eye level.
Waste Disposal	Hazardous waste concentration limit: 1 % Container: Acidic solutions

Phenolftalein 0.1 % CAS number 77-09-8

Labelling
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
C = 0.1 % Generate label		Danger	Highly flammable liquid and vapour.	Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking. Store in a well-ventilated place.

Storage and Waste disposal
Storage	Cabinet: Flammables (including organic solvents) and water reactives
Waste Disposal	Container: Non-halogenated organic substances

Phosphoric acid, H₃PO₄ CAS number 7664-38-2

LabellingSuggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
C ≥ 2.55 M C ≥ 25 % Generate label		Danger	Causes severe skin burns and eye damage.	Wear eye protection. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water (or shower). IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor.
2.55 M > C ≥ 1.02 M 25 % > C ≥ 10 % Generate label		Warning	Causes skin irritation. Causes serious eye irritation.	Wash hands thoroughly after handling. Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention.
C < 1.02 M C < 10 % Generate label	Not classified as a harmful mixture

Storage and Waste disposal
Storage	Cabinet: Acids Store below eye level.
Waste Disposal	Hazardous waste concentration limit: 1 % Container: Acidic solutions

Potassium hydroxide, KOH CAS number 1310-58-3

Labelling Suggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
C ≥ 4.4 M C ≥ 25 % Generate label		Danger	Harmful if swallowed. Causes severe skin burns and eye damage.	Wash hands thoroughly after handling. Wear eye protection. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water (or shower). IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor.
4.4 M > C ≥ 0.35 M 25 % > C ≥ 2 % Generate label		Danger	Causes severe skin burns and eye damage.	Wear eye protection. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water (or shower). IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor.
0.35 M > C ≥ 0.08 M 2 % > C ≥ 0.5 % Generate label		Warning	Causes skin irritation. Causes serious eye irritation.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention.
C < 0.08 M C < 0.5 % Generate label	Not classified as a harmful mixture

Storage and waste disposal
Storage	Cabinet: Bases Store below eye level.
Waste Disposal	Hazardous waste concentration limit: 1 % Container: Alkaline solutions

Potassium bromide, KBr CAS number 7758-02-3

Labelling Suggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
C ≥ 0.84 M C ≥ 10 % Generate label		Warning	Causes serious eye irritation.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention.
C < 0.84 M C < 10 % Generate label	Not classified as a harmful mixture

Storage and Waste disposal
Storage	Cabinet: Toxic
Waste Disposal	Hazardous waste concentration limit: 20 % Container: Solutions of toxic inorganic salts

Potassium permanganate, KMnO₄ CAS number 7722-64-7

LabellingSuggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
C ≥ 1.58 M C ≥ 25 % Generate label		Warning	Harmful if swallowed. Suspected of damaging the unborn child. Very toxic to aquatic life with long lasting effects.	Wash hands thoroughly after handling. Obtain special instructions before use. Wear protective gloves, protective clothing and eye protection. Avoid release to the environment. Collect spillage.
1.58 M > C ≥ 0.18 M 25 % > C ≥ 3 % Generate label		Warning	Suspected of damaging the unborn child. Very toxic to aquatic life with long lasting effects.	Obtain special instructions before use. Wear protective gloves, protective clothing and eye protection. Avoid release to the environment. Collect spillage.
0.18 M > C ≥ 0.15 M 3 % > C ≥ 2.5 % Generate label		Warning	Very toxic to aquatic life with long lasting effects.	Avoid release to the environment. Collect spillage.
0.15 M > C ≥ 0.015 M 2.5 % > C ≥ 0.25 % Generate label			Toxic to aquatic life with long lasting effects.	Avoid release to the environment. Collect spillage.
0.015 M > C ≥ 0.0015 M 0.25 % > C ≥ 0.025 % Generate label			Harmful to aquatic life with long lasting effects.	Avoid release to the environment.
C < 0.0015 M C < 0.025 % Generate label	Not classified as a harmful mixture

Storage and Waste disposal
Storage	Cabinet: Toxic Solid should be stored in cabinet: Oxidising agents.
Waste Disposal	Hazardous waste concentration limit: 0.25 % Container: Solutions of toxic inorganic salts

Potassium thiocyanate, KSCN CAS number 333-20-0

Labelling Suggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
C ≥ 5.6 M C ≥ 55 % Generate label		Danger	Harmful if swallowed, in contact with skin or if inhaled. Causes serious eye damage. Harmful to aquatic life with long lasting effects.	Wash hands thoroughly after handling. Avoid breathing dust. Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor. Avoid release to the environment.
5.6 M > C ≥ 3 M 55 % > C ≥ 30 % Generate label		Danger	Harmful if swallowed or if inhaled. Causes serious eye damage. Harmful to aquatic life with long lasting effects.	Wash hands thoroughly after handling. Avoid breathing dust. Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor. Avoid release to the environment.
3 M > C ≥ 2.5 M 30 % > C ≥ 25 % Generate label		Danger	Harmful if swallowed. Causes serious eye damage. Harmful to aquatic life with long lasting effects.	Wash hands thoroughly after handling. Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor. Avoid release to the environment.
2.5 M > C ≥ 0.3 M 25 % > C ≥ 3 % Generate label		Danger	Causes serious eye damage.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor.
0.3 M > C ≥ 0.1 M 3 % > C ≥ 1 % Generate label		Warning	Causes serious eye irritation.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention.
C < 0.1 M C < 1 % Generate label	Not classified as a harmful mixture

Storage and Waste disposal
Storage	Cabinet: Toxic
Waste Disposal	Hazardous waste concentration limit: 10 % Container: Solutions of toxic inorganic salts

Silver nitrate, AgNO₃ CAS number 7761-88-8

Labelling Suggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
C ≥ 0.29 M C ≥ 5 % Generate label		Danger	Causes severe skin burns and eye damage. Very toxic to aquatic life with long lasting effects.	Wear eye protection. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water (or shower). IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor. Avoid release to the environment. Collect spillage.
0.29 M > C ≥ 0.17 M 5 % > C ≥ 3 % Generate label		Danger	Causes skin irritation. Causes serious eye damage. Very toxic to aquatic life with long lasting effects.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor. Avoid release to the environment. Collect spillage.
0.17 M > C ≥ 0.058 M 3 % > C ≥ 1 % Generate label		Warning	Causes skin irritation. Causes serious eye irritation. Very toxic to aquatic life with long lasting effects.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention. Avoid release to the environment. Collect spillage.
0.058 M > C ≥ 0.001 M 1 % > C ≥ 0.025 % Generate label		Warning	Very toxic to aquatic life with long lasting effects.	Avoid release to the environment. Collect spillage.
0.001 M > C ≥ 0.0001 M 0.025 % > C ≥ 0.0025 % Generate label			Toxic to aquatic life with long lasting effects.	Avoid release to the environment. Collect spillage.
0.0001 M > C ≥ 0.00001 M 0.0025 % > C ≥ 0.00025 % Generate label			Harmful to aquatic life with long lasting effects.	Avoid release to the environment.
C < 0.00001 M C < 0.00025 % Generate label	Not classified as a harmful mixture

Storage and waste disposal
Storage	Cabinet: Toxic Solid should be stored in cabinet: Oxidising agents
Waste Disposal	Hazardous waste concentration limit: 0.25 % Container: Solutions of toxic inorganic salts

Sodium carbonate, Na₂CO₃ CAS number 497-19-8

Labelling Suggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
C ≥ 0.9 M C ≥ 10 % Generate label		Warning	Causes serious eye irritation.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention.
C < 0.9 M C < 10 % Generate label	Not classified as a harmful mixture

Storage and waste disposal
Storage	Cabinet: Bases
Waste Disposal	Hazardous waste concentration limit: 20 % Container: Alkaline solutions

Sodium hydroxide, NaOH CAS number 1310-73-2

Labelling Suggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
C ≥ 0.5 M C ≥ 2 % Generate label		Danger	Causes severe skin burns and eye damage.	Wear eye protection. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water (or shower). IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor.
0.5 M > C ≥ 0.125 M 2 % > C ≥ 0.5 % Generate label		Warning	Causes skin irritation. Causes serious eye irritation.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention.
C < 0.125 M C < 0.5 % Generate label	Not classified as a harmful mixture

Storage and waste disposal
Storage	Cabinet: Bases Store below eye level.
Waste Disposal	Hazardous waste concentration limit: 1 % Container: Alkaline solutions

Sulphuric acid, H₂SO₄ CAS number 7664-93-9

Labelling Suggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
C ≥ 1.5 M C ≥ 15 % Generate label		Danger	Causes severe skin burns and eye damage.	Wear eye protection. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water (or shower). IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor.
1.5 M > C ≥ 0.5 M 15 % > C ≥ 5 % Generate label		Warning	Causes skin irritation. Causes serious eye irritation.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention.
C < 0.5 M C < 5 % Generate label	Not classified as a harmful mixture

Storage and waste disposal
Storage	Cabinet: Acids Store below eye level.
Waste Disposal	Hazardous waste concentration limit: 1 % Container: Acidic solutions

Thymolftalein 0.5 % CAS number 125-20-2

Labelling
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
C = 0.5 % Generate label		Danger	Highly flammable liquid and vapour.	Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking. Store in a well-ventilated place.

Storage and Waste disposal
Storage	Cabinet: Flammables (including organic solvents) and water reactives
Waste Disposal	Container: Non-halogenated organic substances

Zink sulfate, ZnSO₄ CAS number 7733-02-0

Labelling Suggestion of P-statments are made for the use of the chemicals in secondary chemistry education
Concentration	Hazard pictogram	Signal word	H-statements	P-statements
C ≥ 1.5 M C ≥ 25 % Generate label		Danger	Harmful if swallowed. Causes serious eye damage. Very toxic to aquatic life with long lasting effects.	Wash hands thoroughly after handling. Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor. Avoid release to the environment. Collect spillage.
1.5 M > C ≥ 0.18 M 25 % > C ≥ 3 % Generate label		Danger	Causes serious eye damage. Very toxic to aquatic life with long lasting effects.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor. Avoid release to the environment. Collect spillage.
0.18 M > C ≥ 0.15 M 3 % > C ≥ 2.5 % Generate label		Warning	Causes serious eye irritation. Very toxic to aquatic life with long lasting effects.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention. Avoid release to the environment. Collect spillage.
0.15 M > C ≥ 0.06 M 2.5 % > C ≥ 1 % Generate label		Warning	Causes serious eye irritation. Toxic to aquatic life with long lasting effects.	Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical attention. Avoid release to the environment. Collect spillage.
0.06 M > C ≥ 0.015 M 1 % > C ≥ 0.25 % Generate label			Toxic to aquatic life with long lasting effects.	Avoid release to the environment. Collect spillage.
0.015 M > C ≥ 0.0015 M 0.25 % > C ≥ 0.025 % Generate label			Harmful to aquatic life with long lasting effects.	Avoid release to the environment.
C < 0.0015 M C < 0.025 % Generate label	Not classified as a harmful mixture

Storage and waste disposal
Storage	Cabinet: Toxic
Waste Disposal	Hazardous waste concentration limit: 0.25 % Container: Solutions of toxic inorganic salts

Published:

30.06.2022

Last modified:

12.04.2024

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Online Resources for Chemical Safety in Science Education. (2024, April 12).

Labelling.

2024/04/12

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