Hazard symbols

Three systems of hazard markings and classification are currently in use. The most common is the ADR (see below). You may also see GHS symbols (link). The third set (link) are now out of date but may still be seen on some packages.

1. ADR transport pictograms and hazard classes

Pictogram	Class	Hazard category
	1.1	Explosive, subclass 1.1 Mass explosion hazard
	1.2	Explosive, subclass 1.2 Projection hazard
	1.3	Explosive, subclass 1.3 Fire hazard or minor projection hazard
	1.4	Explosive, subclass 1.4 No significant hazard
	1.5	Explosive, subclass 1.5 Very insensitive substances with mass explosion hazard
	1.6	Explosive, subclass 1.6 Extremely insensitive articles with no mass explosion hazard
	2.1	Flammable gases
	2.2	Non-flammable, non-toxic gases
	2.3	Toxic gases
	3	Flammable liquids
	4.1	Flammable solids, self-reactive substances and solid desensitized explosives
	4.2	Substances liable to to spontaneous combustion
	4.3	Substances which, in contact with water, emit flammable gases
	5.1	Oxidizing substances
	5.2	Organic Peroxides
	6.1	Toxic substances
	6.1	Poison
	6.2	Infectious substances
	7	Radioactive material Category I
		Category II
		Category III
		Criticality safety index label
	8	Corrosive substances
	9	Miscellaneous dangerous substances and articles

2. GHS pictograms and hazard classes

Symbol: exploding bomb

Pictogram

Hazard class and hazard category

Section 2.1

Unstable explosives
Explosives of Divisions 1.1, 1.2, 1.3, 1.4

Section 2.8

Self reactive substances and mixtures, Types A, B

Section 2.15

Organic peroxides, Types A, B

Symbol: flame

Pictogram

Hazard class and hazard category

Section 2.2

Flammable gases, hazard category 1

Section 2.3

Flammable aerosols, hazard categories 1, 2

Section 2.6

Flammable liquids, hazard categories 1, 2, 3

Section 2.7

Flammable solids, hazard categories 1, 2

Section 2.8

Self-reactive substances and mixtures, Types B, C, D, E, F

Section 2.9

Pyrophoric liquids, hazard category 1

Section 2.10

Pyrophoric solids, hazard category 1

Section 2.11

Self-heating substances and mixtures, hazard categories 1, 2

Section 2.12

Substances and mixtures, which in contact with water, emit flammable gases, hazard categories 1, 2, 3

Section 2.15

Organic peroxides, Types B, C, D, E, F

Symbol: flame over circle

Pictogram

Hazard class and hazard category

Section 2.4

Oxidising gases, hazard category 1

Section 2.13

Oxidising liquids, hazard categories 1, 2, 3

Section 2.14

Oxidising solids, hazard categories 1, 2, 3

Symbol: gas cylinder

Pictogram

Hazard class and hazard category

Section 2.5

Gases under pressure:
   Compressed gases;
   Liquefied gases;
   Refrigerated liquefied gases;
Dissolved gases

Symbol: corrosion

Pictogram

Hazard class and hazard category

Section 2.16

Corrosive to metals, hazard category 1

Section 3.2

Skin corrosion, hazard categories 1A, 1B, 1C

Section 3.3

Serious eye damage, hazard category 1

Symbol: skull and crossbones

Pictogram

Hazard class and hazard category

Section 3.1

Acute toxicity (oral, dermal, inhalation), hazard categories 1, 2, 3

Symbol: exclamation mark

Pictogram

Hazard class and hazard category

Section 3.1

Acute toxicity (oral, dermal, inhalation), hazard category 4

Section 3.2

Skin irritation, hazard category 2

Section 3.3

Eye irritation, hazard category 2

Section 3.4

Skin sensitisation, hazard category 1

Section 3.8

Specific Target Organ Toxicity — Single exposure, hazard category 3
Respiratory tract irritation
Narcotic effects

Symbol: health hazard

Pictogram

Hazard class and hazard category

Section 3.4

Respiratory sensitisation, hazard category 1

Section 3.5

Germ cell mutagenicity, hazard categories 1A, 1B, 2

Section 3.6

Carcinogenicity, hazard categories 1A, 1B, 2

Section 3.7

Reproductive toxicity, hazard categories 1A, 1B, 2

Section 3.8

Specific Target Organ Toxicity — Single exposure, hazard categories 1, 2

Section 3.9

Specific Target Organ Toxicity — Repeated exposure, hazard categories 1, 2

Section 3.10

Aspiration hazard, hazard category 1

Symbol: environment

Pictogram

Hazard class and hazard category

Section 4.1

Hazardous to the aquatic environment
Acute hazard category 1
Chronic hazard categories 1, 2

3. Hazard symbols for chemicals

Pictogram	Hazard class and hazard category
	O: Oxidizing
	T: Toxic T+: Very toxic
	C: Corrosive
	E: Explosive
	N: Dangerous for the environment
	Xn: Harmful Xi: Irritant
	F: Flammable F+: Extremely flammable

The guidance contained in this section intended to serve as a general reminder of the risks that are sometimes encountered during the examination and sampling procedure and of the safety equipment that you should use and precautions that you should take.
You must refer to the legislation and the guidance of your national administration for more information.