Hazard Statement Codes (H-Statements)
Hazard statements are standardized phrases describing the nature and severity of chemical hazards. They are essential components of GHS classification and labeling, forming a set of standardized phrases that can be translated into different languages. These statements provide clear, consistent communication of hazards across different languages and regions.
Physical Hazards (H200-H299)
| Code | Statement | Classification |
|---|---|---|
| H200 | Unstable explosive | Explosives |
| H201 | Explosive: mass explosion hazard | Explosives, Division 1.1 |
| H202 | Explosive: severe projection hazard | Explosives |
| H203 | Explosive: fire, blast or projection hazard | Explosives |
| H204 | Fire or projection hazard | Explosives |
| H205 | May mass explode in fire | Explosives |
| H206 | Fire, blast or projection hazard: increased risk of explosion if desensitizing agent is reduced | Desensitized explosives |
| H207 | Fire or projection hazard; increased risk of explosion if desensitizing agent is reduced | Desensitized explosives |
| H208 | Fire hazard; increased risk of explosion if desensitizing agent is reduced | Desensitized explosives |
| H209 | Explosive | Explosives |
| H210 | Very sensitive | Explosives |
| H211 | May be sensitive | Explosives |
| H220 | Extremely flammable gas | Flammable gases |
| H221 | Flammable gas | Flammable gases |
| H222 | Extremely flammable material | Aerosols |
| H223 | Flammable material | Aerosols |
| H224 | Extremely flammable liquid and vapour | Flammable liquids |
| H225 | Highly flammable liquid and vapour | Flammable liquids |
| H226 | Flammable liquid and vapour | Flammable liquids |
| H227 | Combustible liquid | Flammable liquids |
| H228 | Flammable solid | Flammable solids |
| H229 | Pressurized container: may burst if heated | Aerosols |
| H230 | May react explosively even in the absence of air | Flammable gases |
| H231 | May react explosively even in the absence of air at elevated pressure and/or temperature | Flammable gases |
| H232 | May ignite spontaneously if exposed to air | Flammable gases |
| H240 | Heating may cause an explosion | Self-reactive substances and mixtures |
| H241 | Heating may cause a fire or explosion | Self-reactive substances and mixtures |
| H242 | Heating may cause a fire | Self-reactive substances and mixtures |
| H250 | Catches fire spontaneously if exposed to air | Pyrophoric liquids/solids |
| H251 | Self-heating: may catch fire | Self-heating substances and mixtures |
| H252 | Self-heating in large quantities: may catch fire | Self-heating substances and mixtures |
| H260 | In contact with water releases flammable gases which may ignite spontaneously | Substances which in contact with water emit flammable gases |
| H261 | In contact with water releases flammable gas | Substances which in contact with water emit flammable gases |
| H270 | May cause or intensify fire: oxidizer | Oxidizing gases |
| H271 | May cause fire or explosion: strong oxidizer | Oxidizing liquids/solids |
| H272 | May intensify fire: OXIDISER | Oxidizing liquids/solids |
| H280 | Contains gas under pressure: may explode if heated | Gases under pressure |
| H281 | Contains refrigerated gas: may cause cryogenic burns or injury | Gases under pressure |
| H282 | Extremely flammable chemical under pressure: May explode if heated | Chemicals under pressure |
| H283 | Flammable chemical under pressure: May explode if heated | Chemicals under pressure |
| H284 | Chemical under pressure: May explode if heated | Chemicals under pressure |
| H290 | May be corrosive to metals | Corrosive to metals |
Health Hazards (H300-H399)
| Code | Statement | Classification |
|---|---|---|
| H300 | Fatal if swallowed | Acute toxicity (oral), Category 1, 2 |
| H301 | Toxic if swallowed | Acute toxicity (oral), Category 3 |
| H302 | Harmful if swallowed | Acute toxicity (oral), Category 4 |
| H303 | May be harmful if swallowed | Acute toxicity (oral), Category 5 |
| H304 | May be fatal if swallowed and enters airways | Aspiration hazard |
| H305 | May be harmful if swallowed and enters airways | Aspiration hazard |
| H310 | Fatal in contact with skin | Acute toxicity (dermal), Category 1, 2 |
| H311 | Toxic in contact with skin | Acute toxicity (dermal), Category 3 |
| H312 | Harmful in contact with skin | Acute toxicity (dermal), Category 4 |
| H313 | May be harmful in contact with skin | Acute toxicity (dermal), Category 5 |
| H314 | Causes severe skin burns and eye damage | Skin corrosion/irritation |
| H315 | Causes skin irritation | Skin corrosion/irritation |
| H316 | Causes mild skin irritation | Skin corrosion/irritation |
| H317 | May cause an allergic skin reaction | Skin sensitization |
| H318 | Causes serious eye damage | Serious eye damage/eye irritation |
| H319 | Causes serious eye irritation | Serious eye damage/eye irritation |
| H320 | Causes eye irritation | Serious eye damage/eye irritation |
| H330 | Fatal if inhaled | Acute toxicity (inhalation), Category 1, 2 |
| H331 | Toxic if inhaled | Acute toxicity (inhalation), Category 3 |
| H332 | Harmful if inhaled | Acute toxicity (inhalation), Category 4 |
| H333 | May be harmful if inhaled | Acute toxicity (inhalation), Category 5 |
| H334 | May cause allergy or asthma symptoms or breathing difficulties if inhaled | Respiratory sensitization |
| H335 | May cause respiratory irritation | Specific target organ toxicity, single exposure |
| H336 | May cause drowsiness or dizziness | Specific target organ toxicity, single exposure |
| H340 | May cause genetic defects | Germ cell mutagenicity |
| H341 | Suspected of causing genetic defects | Germ cell mutagenicity |
| H350 | May cause cancer | Carcinogenicity |
| H350i | May cause cancer by inhalation | Carcinogenicity |
| H351 | Suspected of causing cancer | Carcinogenicity |
| H360 | May damage fertility or the unborn child | Reproductive toxicity |
| H360D | May damage the unborn child | Reproductive toxicity |
| H360Df | May damage the unborn child. Suspected of damaging fertility. | Reproductive toxicity |
| H360F | May damage fertility | Reproductive toxicity |
| H360FD | May damage fertility. May damage the unborn child. | Reproductive toxicity |
| H360Fd | May damage fertility. Suspected of damaging the unborn child. | Reproductive toxicity |
| H361 | Suspected of damaging fertility or the unborn child | Reproductive toxicity |
| H361d | Suspected of damaging the unborn child | Reproductive toxicity |
| H361f | Suspected of damaging fertility | Reproductive toxicity |
| H361fd | Suspected of damaging fertility. Suspected of damaging the unborn child. | Reproductive toxicity |
| H362 | May cause harm to breast-fed children | Reproductive toxicity, effects on or via lactation |
| H370 | Causes damage to organs | Specific target organ toxicity, single exposure |
| H371 | May cause damage to organs | Specific target organ toxicity, single exposure |
| H372 | Causes damage to organs through prolonged or repeated exposure | Specific target organ toxicity, repeated exposure |
| H373 | May cause damage to organs through prolonged or repeated exposure | Specific target organ toxicity, repeated exposure |
Environmental Hazards (H400-H499)
| Code | Statement | Classification |
|---|---|---|
| H400 | Very toxic to aquatic life | Hazardous to the aquatic environment, Acute Category 1 |
| H401 | Toxic to aquatic life | Hazardous to the aquatic environment, Acute Category 2 |
| H402 | Harmful to aquatic life | Hazardous to the aquatic environment, Acute Category 3 |
| H410 | Very toxic to aquatic life with long lasting effects | Hazardous to the aquatic environment, Chronic Category 1 |
| H411 | Toxic to aquatic life with long lasting effects | Hazardous to the aquatic environment, Chronic Category 2 |
| H412 | Harmful to aquatic life with long lasting effects | Hazardous to the aquatic environment, Chronic Category 3 |
| H413 | May cause long lasting harmful effects to aquatic life | Hazardous to the aquatic environment, Chronic Category 4 |
| H420 | Harms public health and the environment by destroying ozone in the upper atmosphere | Hazardous to the ozone layer |
| H441 | Very toxic to terrestrial invertebrates | Hazardous to terrestrial environment |
Combined Hazard Statements
Some hazard statements can be combined when applicable to a substance or mixture:
- H300 + H310: Fatal if swallowed or in contact with skin
- H300 + H330: Fatal if swallowed or if inhaled
- H310 + H330: Fatal in contact with skin or if inhaled
- H300 + H310 + H330: Fatal if swallowed, in contact with skin or if inhaled
Important Notes:
- Always use the most recent version of hazard statements as per GHS/CLP updates
- Some hazard statements may have precedence over others
- Translations must maintain the exact meaning of the original statements
- Hazard statements must appear in the language(s) of the country where the substance is placed on the market
