• Unstable explosives
• Explosives, divisions 1.1, 1.2, 1.3, 1.4, 1.5, 1.6
• Self-reactive substances and mixtures, types A, B
• Organic peroxides, types A, B

Further information: Explosive material

• Flammable gases, category 1
• Flammable aerosols, categories 1, 2
• Flammable liquids, categories 1, 2, 3, 4
• Flammable solids, categories 1, 2
• Self-reactive substances and mixtures, types B, C, D, E, F
• Pyrophoric liquids, category 1
• Pyrophoric solids, category 1
• Combustible solids, category 3
• Combustible liquids, category 3
• Self-heating substances and mixtures, categories 1, 2
• Substances and mixtures, which in contact with water, emit flammable gases, categories 1, 2, 3
• Organic peroxides, types B, C, D, E, F

Further information: Flammability

• Oxidizing gases, category 1
• Oxidizing liquids, categories 1, 2, 3
• Oxidizing solids, categories 1, 2, 3

Further information: Oxidizing agent

• Compressed gases
• Liquefied gases
• Refrigerated liquefied gases
• Dissolved gases
• e.g. liquid nitrogen, liquid oxygen, liquid helium

• Corrosive to metals, category 1

Further information: Corrosive substance

• Explosives, divisions 1.5, 1.6
• Flammable gases, category 2
• Self-reactive substances and mixtures, type G (see HAZMAT Class 4 Flammable solids)
• Organic peroxides, type G

• Acute toxicity (oral, dermal, inhalation), categories 1, 2, 3
• e.g. manganese heptoxide (fire diamond rating at health hazard is 4)

• Acute toxicity (oral, dermal, inhalation), category 4
• Skin irritation, categories 2, 3
• Eye irritation, category 2A
• Skin sensitization, category 1
• Specific target organ toxicity following single exposure, category 3
  • Respiratory tract irritation
  • Narcotic effects

Not used³

• with the "skull and crossbones" pictogram
• for skin or eye irritation if:
  • the "corrosion" pictogram also appears
  • the "health hazard" pictogram is used to indicate respiratory sensitization

• Respiratory sensitization, category 1
• Germ cell mutagenicity, categories 1A, 1B, 2
• Carcinogenicity, categories 1A, 1B, 2
• Reproductive toxicity, categories 1A, 1B, 2
• Specific target organ toxicity following single exposure, categories 1, 2
• Specific target organ toxicity following repeated exposure, categories 1, 2
• Aspiration hazard, categories 1, 2
• e.g. chromium, cadmium

• Acute toxicity (oral, dermal, inhalation), category 5
• Eye irritation, category 2B
• Reproductive toxicity – effects on or via lactation

• Explosives, divisions 1.5, 1.6
• Flammable gases, category 2
• Self-reactive substances and mixtures, type G (see HAZMAT Class 4 Flammable solids)
• Organic peroxides, type G
• Skin corrosion, categories 1A, 1B, 1C
• Serious eye damage, category 1

• Acute hazards to the aquatic environment, category 1
• Chronic hazards to the aquatic environment, categories 1, 2

• Acute hazards to the aquatic environment, categories 2, 3
• Chronic hazards to the aquatic environment, categories 3, 4

Note: The asterisks are replaced by the class number and compatibility code

Explosives – Substances and articles which are classified as explosives but which present no significant hazard

Note: The asterisk is replaced by the compatibility code

Explosives – Very insensitive substances which have a mass explosion hazard

Note: The asterisk is replaced by the compatibility code

Explosives – No hazard statement

Note: The asterisk is replaced by the compatibility code

Flammable gases – Gases which at 20 °C and a standard pressure of 101.3 kPa:

• are ignitable when in a mixture of 13 percent or less by volume with air; or
• have a flammable range with air of at least 12 percentage points regardless of the lower flammable limit.

Alternative sign

Non-flammable non-toxic gases – Gases which:

• are asphyxiant – gases which dilute or replace the oxygen normally in the atmosphere; or
• are oxidizing – gases which may, generally by providing oxygen, cause or contribute to the combustion of other material more than air does; or
• do not come under the other divisions.

Alternative sign

Toxic gases – Gases which:

• are known to be so toxic or corrosive to humans as to pose a hazard to health; or
• are presumed to be toxic or corrosive to humans because they have an LC50 value equal to or less than 5000 ml/m3 (ppm).

e.g. hydrogen cyanide

Flammable liquids – Liquids which have a flash point of less than 60 °C and which are capable of sustaining combustion

Alternative sign

Flammable solids, self-reactive substances and solid desensitized explosives – Solids which, under conditions encountered in transport, are readily combustible or may cause or contribute to fire through friction; self-reactive substances which are liable to undergo a strongly exothermic reaction; solid desensitized explosives which may explode if not diluted sufficiently

Substances liable to spontaneous combustion – Substances which are liable to spontaneous heating under normal conditions encountered in transport, or to heating up in contact with air, and being then liable to catch fire

e.g. manganese heptoxide

Substances which in contact with water emit flammable gases – Substances which, by interaction with water, are liable to become spontaneously flammable or to give off flammable gases in dangerous quantities

Alternative sign

Oxidizing substances – Substances which, while in themselves not necessarily combustible, may, generally by yielding oxygen, cause, or contribute to, the combustion of other material

Organic peroxides – Organic substances which contain the bivalent –O–O– structure and may be considered derivatives of hydrogen peroxide, where one or both of the hydrogen atoms have been replaced by organic radicals

Alternative sign

Toxic substances – Substances with an LD50 value ≤ 300 mg/kg (oral) or ≤ 1000 mg/kg (dermal) or an LC50 value ≤ 4000 ml/m3 (inhalation of dusts or mists)

e.g. nearly everything that contains cyanide groups

Corrosive substances – Substances which:

• cause full thickness destruction of intact skin tissue on exposure time of less than 4 hours; or
• exhibit a corrosion rate of more than 6.25 mm per year on either steel or aluminium surfaces at 55 °C