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| Hazard Statements (H-Statments) |
The GHS also has Precaution Statements which provide standardized precaution wordings. You will usually find both P- and H-statements on a label or MSDS.
In the European Union, H-statements will replace Risk phrases (R-phrases), as the GHS is phased in per Regulation (EC) No 1272/2008 (6.6 MB PDF file). Conversions of R-phrases to H-statements are listed beginning on page 1352 of that document.
The codes have the form Hnxx where H stands for "hazard statement"; n=2 for physical hazards, n=3 for health hazards, and n=4 for environmental hazards; and xx is a sequential numbering scheme.
Thus, an MSDS or label might bear a statement such as "May be corrosive to metals (H290)". H indicates a Hazard, the 2 indicates a physical hazard, and 90 is part of the numbering scheme.
| Code | Physical hazard statement | Hazard Class (GHS Chapter) | Hazard Category |
|---|---|---|---|
| H200 | Unstable explosive | Explosives (chapter 2.1) | Unstable explosive |
| H201 | Explosive; mass explosive hazard | Explosives (chapter 2.1) | Division 1.1 |
| H202 | Explosive; severe projection hazard | Explosives (chapter 2.1) | Division 1.2 |
| H203 | Explosive; fire, blast or projection hazard | Explosives (chapter 2.1) | Division 1.3 |
| H204 | Fire or projection hazard | Explosives (chapter 2.1) | Division 1.4 |
| H205 | May mass explode in fire | Explosives (chapter 2.1) | Division 1.5 |
| H220 | Extremely flammable gas | Flammable gases (chapter 2.2) | 1 |
| H221 | Flammable gas | Flammable gases (chapter 2.2) | 2 |
| H222 | Extremely flammable aerosol | Flammable aerosols (chapter 2.3) | 1 |
| H223 | Flammable aerosol | Flammable aerosols (chapter 2.3) | 2 |
| H224 | Extremely flammable liquid and vapour | Flammable liquids (chapter 2.6) | 1 |
| H225 | Highly flammable liquid and vapour | Flammable liquids (chapter 2.6) | 2 |
| H226 | Flammable liquid and vapour | Flammable liquids (chapter 2.6) | 3 |
| H227 | Combustible liquid | Flammable liquids (chapter 2.6) | 4 |
| H228 | Flammable solid | Flammable solids (chapter 2.7) | 1, 2 |
| H240 | Heating may cause an explosion | Self-reactive substances and mixtures (chapter 2.8); and Organic peroxides (chapter 2.15) | Type A |
| H241 | Heating may cause a fire or explosion | Self-reactive substances and mixtures (chapter 2.8); and Organic peroxides (chapter 2.15) | Type B |
| H242 | Heating may cause a fire | Self-reactive substances and mixtures (chapter 2.8); and Organic peroxides (chapter 2.15) | Types C, D, E, F |
| H250 | Catches fire spontaneously if exposed to air | Pyrophoric liquids (chapter 2.9); Pyrophoric solids (chapter 2.10) | 1 |
| H251 | Self-heating;; may catch fire | Self-heating; substances and mixtures (chapter 2.11) | 1 |
| H252 | Self-heating; in large quantities; may catch fire | Self-heating; substances and mixtures (chapter 2.11) | 2 |
| H260 | In contact with water releases flammable gases which may ignite spontaneously | Substances and mixtures which, in contact with water, emit flammable gases (chapter 2.12) | 1 |
| H261 | In contact with water releases flammable gas | Substances and mixtures which, in contact with water, emit flammable gases (chapter 2.12) | 2, 3 |
| H270 | May cause or intensify fire; oxidizer | Oxidizing gases (chapter 2.4) | 1 |
| H271 | May cause fire or explosion; strong oxidizer | Oxidizing liquids (chapter 2.13); Oxidizing solids (chapter 2.14) | 1 |
| H272 | May intensify fire; oxidizer | Oxidizing liquids (chapter 2.13); Oxidizing solids (chapter 2.14) | 2, 3 |
| H280 | Contains gas under pressure; may explode if heated | Gases under pressure (chapter 2.5) | Compressed gas Liquefied gas Dissolved gas |
| H281 | Contains refrigerated gas; may cause cryogenic burns or injury | Gases under pressure (chapter 2.5) | Refrigerated liquefied gas |
| H290 | May be corrosive to metals | Corrosive to metals (chapter 2.16) | 1 |
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| Code | Health hazard statement | Hazard Class (GHS Chapter) | Hazard Category |
|---|---|---|---|
| H300 | Fatal if swallowed | Acute toxicity, oral (chapter 3.1) | 1, 2 |
| H301 | Toxic if swallowed | Acute toxicity, oral (chapter 3.1) | 3 |
| H302 | Harmful if swallowed | Acute toxicity, oral (chapter 3.1) | 4 |
| H303 | May be harmful if swallowed | Acute toxicity, oral (chapter 3.1) | 5 |
| H304 | May be fatal if swallowed and enters airways | Aspiration hazard (chapter 3.10) | 1 |
| H305 | May be harmful if swallowed and enters airways | Aspiration hazard (chapter 3.10) | 2 |
| H310 | Fatal in contact with skin | Acute toxicity, dermal (chapter 3.1) | 1, 2 |
| H311 | Toxic in contact with skin | Acute toxicity, dermal (chapter 3.1) | 3 |
| H312 | Harmful in contact with skin | Acute toxicity, dermal (chapter 3.1) | 4 |
| H313 | May be harmful in contact with skin | Acute toxicity, dermal (chapter 3.1) | 5 |
| H314 | Causes severe skin burns and eye damage | Skin corrosion/irritation (chapter 3.2) | 1A, 1B, 1C |
| H315 | Causes skin irritation | Skin corrosion/irritation (chapter 3.2) | 2 |
| H316 | Causes mild skin irritation | Skin corrosion/irritation (chapter 3.2) | 3 |
| H317 | May cause an allergic skin reaction | Sensitization, skin (chapter 3.4) | 1 |
| H318 | Causes serious eye damage | Serious eye damage/eye irritation (chapter 3.3) | 1 |
| H319 | Causes serious eye irritation | Serious eye damage/eye irritation (chapter 3.3) | 2A |
| H320 | Causes eye irritation | Serious eye damage/eye irritation (chapter 3.3) | 2B |
| H330 | Fatal if inhaled | Acute toxicity, inhalation (chapter 3.1) | 1, 2 |
| H331 | Toxic if inhaled | Acute toxicity, inhalation (chapter 3.1) | 3 |
| H332 | Harmful if inhaled | Acute toxicity, inhalation (chapter 3.1) | 4 |
| H333 | May be harmful if inhaled | Acute toxicity, inhalation (chapter 3.1) | 5 |
| H334 | May cause allergy or asthma symptoms or breathing difficulties if inhaled | Sensitization, respiratory (chapter 3.4) | 1 |
| H335 | May cause respiratory irritation | Specific target organ toxicity, single exposure; Respiratory tract irritation (chapter 3.8) | 3 |
| H336 | May cause drowsiness or dizziness | Specific target organ toxicity, single exposure; Narcotic effects (chapter 3.8) | 3 |
| H340 | May cause genetic defects (state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard) | Germ cell mutagenicity (chapter 3.5) | 1A, 1B |
| H341 | Suspected of causing genetic defects (state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard) | Germ cell mutagenicity (chapter 3.5) | 2 |
| H350 | May cause cancer (state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard) | Carcinogenicity (chapter 3.6) | 1A, 1B |
| H351 | Suspected of causing cancer (state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard) | Carcinogenicity (chapter 3.6) | 2 |
| H360 | May damage fertility or the unborn child (state specific effect if known)(state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard) | Reproductive toxicity (chapter 3.7) | 1A, 1B |
| H361 | Suspected of damaging fertility or the unborn child (state specific effect if known)(state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard) | Reproductive toxicity (chapter 3.7) | 2 |
| H362 | May cause harm to breast-fed children | Reproductive toxicity, effects on or via lactation (chapter 3.7) | Additional category |
| H370 | Causes damage to organs (or state all organs affected, if known) (state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard) | Specific target organ toxicity, single exposure (chapter 3.8) | 1 |
| H371 | May cause damage to organs (or state all organs affected, if known)(state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard) | Specific target organ toxicity, single exposure (chapter 3.8) | 2 |
| H372 | Causes damage to organs (state all organs affected, if known) through prolonged or repeated exposure (state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard) | Specific target organ toxicity, repeated exposure (chapter 3.9) | 1 |
| H373 | May cause damage to organs (state all organs affected, if known) through prolonged or repeated exposure (state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard) | Specific target organ toxicity, repeated exposure (chapter 3.9) | 2 |
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| Code | Environmental hazard statement | Hazard Class (GHS Chapter) | Hazard Category |
|---|---|---|---|
| h400 | Very toxic to aquatic life | Hazardous to the aquatic environment, acute toxicity (chapter 4.1) | 1 |
| h401 | Toxic to aquatic life | Hazardous to the aquatic environment, acute toxicity (chapter 4.1) | 2 |
| h402 | Harmful to aquatic life | Hazardous to the aquatic environment, acute toxicity (chapter 4.1) | 3 |
| h410 | Very toxic to aquatic life with long lasting effects | Hazardous to the aquatic environment, chronic toxicity (chapter 4.1) | 1 |
| h411 | Toxic to aquatic life with long lasting effects | Hazardous to the aquatic environment, chronic toxicity (chapter 4.1) | 2 |
| h412 | Harmful to aquatic life with long lasting effects | Hazardous to the aquatic environment, chronic toxicity (chapter 4.1) | 3 |
| h413 | May cause long lasting harmful effects to aquatic life | Hazardous to the aquatic environment, chronic toxicity (chapter 4.1) | 4 |
MSDS Relevance
Remember that H-statements phrases indicate only the hazards of a material, not the safety precautions that you need to follow. For safety information see the Precaution Statements entry.
Further Reading
|  Gas cylinder tags and all kind of workplace accessories are available at Safety Emporium |
Additional definitions from Google and OneLook.
Disclaimer: The information contained herein is believed to be true and accurate, however ILPI makes no guarantees concerning the veracity of any statement. Use of any information on this page is at the reader's own risk. ILPI strongly encourages the reader to consult the appropriate local, state and federal agencies concerning the matters discussed herein.