Hazard statements (H-codes)
What can go wrong: the standardized statements from H224 to H413 — each with its hazard class and category, signal word, pictogram, and commonly paired P-codes, all from the same tables our classification engine writes into SDS Section 2. Texts follow GHS Rev 9 as adopted by OSHA HazCom 2024.
Physical hazards (H2xx)
CODESTATEMENT · CLASS & CATEGORYSIGNALPICTOGRAM · PAIRED P-CODES
H224Extremely flammable liquid and vapor.Flammable liquids · Category 1Danger
GHS02P210 P233 P235 P240 P241 P242 P243 P280 P303 P353 P361 P370 P403 P501H225Highly flammable liquid and vapor.Flammable liquids · Category 2DangerGHS02P210 P233 P235 P240 P241 P242 P243 P280 P303 P353 P361 P370 P403 P501H226Flammable liquid and vapor.Flammable liquids · Category 3WarningGHS02P210 P233 P235 P240 P241 P242 P243 P280 P303 P353 P361 P370 P403 P501H227Combustible liquid.Flammable liquids · Category 4Warning—P210 P280 P370 P403 P501H271May cause fire or explosion; strong oxidizer.Oxidizing liquids and solids · Category 1Danger
GHS03P210 P220 P280 P370 P501H272May intensify fire; oxidizer.Oxidizing liquids and solids · Categories 2 and 3Danger (Category 2) / Warning (Category 3)GHS03P210 P220 P280 P501H290May be corrosive to metals.Corrosive to metals · Category 1Warning
GHS05P234 P390 P406Health hazards (H3xx)
CODESTATEMENT · CLASS & CATEGORYSIGNALPICTOGRAM · PAIRED P-CODES
H300Fatal if swallowed.Acute toxicity, oral · Categories 1 and 2Danger
GHS06P264 P270 P301 P310 P321 P405 P501H301Toxic if swallowed.Acute toxicity, oral · Category 3DangerGHS06P264 P270 P301 P310 P321 P405 P501H302Harmful if swallowed.Acute toxicity, oral · Category 4Warning
GHS07P264 P270 P301 P312 P330 P501H303May be harmful if swallowed.Acute toxicity, oral · Category 5Warning—H304May be fatal if swallowed and enters airways.Aspiration hazard · Category 1Danger
GHS08P301 P310 P331 P405 P501H310Fatal in contact with skin.Acute toxicity, dermal · Categories 1 and 2DangerGHS06P262 P264 P280 P302 P310 P321 P361 P363 P405 P501H311Toxic in contact with skin.Acute toxicity, dermal · Category 3DangerGHS06P280 P302 P312 P321 P361 P363 P405 P501H312Harmful in contact with skin.Acute toxicity, dermal · Category 4WarningGHS07P280 P302 P312 P321 P352 P363 P501H313May be harmful in contact with skin.Acute toxicity, dermal · Category 5Warning—H314Causes severe skin burns and eye damage.Skin corrosion · Category 1 (1A, 1B, 1C)DangerGHS05P260 P264 P280 P301 P303 P304 P305 P310 P330 P331 P338 P353 P361 P363 P405 P501H315Causes skin irritation.Skin irritation · Category 2WarningGHS07P264 P280 P302 P312 P332 P333 P352 P362 P363H316Causes mild skin irritation.Skin irritation · Category 3 (mild irritation)Warning—H317May cause an allergic skin reaction.Skin sensitization · Category 1 (1A, 1B)WarningGHS07P261 P272 P280 P302 P312 P321 P333 P352 P362 P363 P501H318Causes serious eye damage.Serious eye damage · Category 1DangerGHS05P280 P305 P310 P338 P351H319Causes serious eye irritation.Serious eye irritation · Category 2AWarningGHS07P264 P280 P305 P337 P338 P351H320Causes eye irritation.Eye irritation · Category 2BWarning—H330Fatal if inhaled.Acute toxicity, inhalation · Categories 1 and 2DangerGHS06P260 P271 P284 P304 P310 P320 P340 P403 P405 P501H331Toxic if inhaled.Acute toxicity, inhalation · Category 3DangerGHS06P261 P271 P304 P311 P321 P340 P403 P405 P501H332Harmful if inhaled.Acute toxicity, inhalation · Category 4WarningGHS07P261 P271 P304 P312 P340H333May be harmful if inhaled.Acute toxicity, inhalation · Category 5Warning—H334May cause allergy or asthma symptoms or breathing difficulties if inhaled.Respiratory sensitization · Category 1 (1A, 1B)DangerGHS08P261 P285 P304 P311 P342 P501H335May cause respiratory irritation.Specific target organ toxicity, single exposure · Category 3 (respiratory tract irritation)WarningGHS07P261 P271 P304 P312 P340 P403 P405 P501H336May cause drowsiness or dizziness.Specific target organ toxicity, single exposure · Category 3 (narcotic effects)WarningGHS07P261 P271 P304 P312 P340 P403 P405 P501H340May cause genetic defects.Germ cell mutagenicity · Category 1 (1A, 1B)DangerGHS08P201 P202 P280 P308 P313 P405 P501H341Suspected of causing genetic defects.Germ cell mutagenicity · Category 2WarningGHS08P201 P202 P280 P308 P313 P405 P501H350May cause cancer.Carcinogenicity · Category 1 (1A, 1B)DangerGHS08P201 P202 P280 P308 P313 P405 P501H351Suspected of causing cancer.Carcinogenicity · Category 2WarningGHS08P201 P202 P280 P308 P313 P405 P501H360May damage fertility or the unborn child.Reproductive toxicity · Category 1 (1A, 1B)DangerGHS08P201 P202 P280 P308 P313 P405 P501H361Suspected of damaging fertility or the unborn child.Reproductive toxicity · Category 2WarningGHS08P201 P202 P280 P308 P313 P405 P501H370Causes damage to organs.Specific target organ toxicity, single exposure · Category 1DangerGHS08P260 P264 P270 P307 P311 P321 P405 P501H371May cause damage to organs.Specific target organ toxicity, single exposure · Category 2WarningGHS08P260 P264 P270 P309 P311 P405 P501H372Causes damage to organs through prolonged or repeated exposure.Specific target organ toxicity, repeated exposure · Category 1DangerGHS08P260 P264 P270 P314 P501H373May cause damage to organs through prolonged or repeated exposure.Specific target organ toxicity, repeated exposure · Category 2WarningGHS08P260 P314 P501Environmental hazards (H4xx)
Environmental classes appear on SDSs and labels; in the US they sit with EPA and DOT rather than OSHA.
CODESTATEMENT · CLASS & CATEGORYSIGNALPICTOGRAM · PAIRED P-CODES
H400Very toxic to aquatic life.Hazardous to the aquatic environment — acute · Category 1Warning
GHS09P273 P391 P501H401Toxic to aquatic life.Hazardous to the aquatic environment — acute · Category 2No signal word—P273 P501H402Harmful to aquatic life.Hazardous to the aquatic environment — acute · Category 3No signal word—P273H410Very toxic to aquatic life with long lasting effects.Hazardous to the aquatic environment — chronic · Category 1WarningGHS09P273 P391 P501H411Toxic to aquatic life with long lasting effects.Hazardous to the aquatic environment — chronic · Category 2No signal wordGHS09P273 P391 P501H412Harmful to aquatic life with long lasting effects.Hazardous to the aquatic environment — chronic · Category 3No signal word—P273 P501H413May cause long lasting harmful effects to aquatic life.Hazardous to the aquatic environment — chronic · Category 4No signal word—P273 P501Reference information, not legal or professional advice. Statement texts and allocations follow GHS Rev 9 / 29 CFR 1910.1200 Appendix C as implemented by our classification engine; the regulatory text and agency practice control. Claims last reviewed July 23, 2026.
The engine writes these for you.
When SDS HQ authors an SDS or a container label, it assigns the hazard statements, signal word, pictograms, and precautionary statements from these same tables — automatically, with the calculation shown.