SDS HQ
Start free
The libraryAuthoringPricingGuides
Sign inStart free
GHS REFERENCE

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 the GHS as adopted by OSHA HazCom 2024.

Physical hazards (H2xx)

CODESTATEMENT · CLASS & CATEGORYSIGNALPICTOGRAM · PAIRED P-CODES
H224Extremely flammable liquid and vapor.Flammable liquids · Category 1DangerGHS02 FlammableGHS02P210 P233 P235 P240 P241 P242 P243 P280 P303 P353 P361 P370 P378 P403 P501H225Highly flammable liquid and vapor.Flammable liquids · Category 2DangerGHS02 FlammableGHS02P210 P233 P235 P240 P241 P242 P243 P280 P303 P353 P361 P370 P378 P403 P501H226Flammable liquid and vapor.Flammable liquids · Category 3WarningGHS02 FlammableGHS02P210 P233 P235 P240 P241 P242 P243 P280 P303 P353 P361 P370 P378 P403 P501H227Combustible liquid.Flammable liquids · Category 4Warning—P210 P280 P370 P378 P403 P501H271May cause fire or explosion; strong oxidizer.Oxidizing liquids and solids · Category 1DangerGHS03 OxidizerGHS03P210 P220 P280 P283 P306 P360 P370 P371 P375 P378 P380 P420 P501H272May intensify fire; oxidizer.Oxidizing liquids and solids · Categories 2 and 3Danger (Category 2) / Warning (Category 3)GHS03 OxidizerGHS03P210 P220 P280 P370 P378 P501H290May be corrosive to metals.Corrosive to metals · Category 1WarningGHS05 CorrosiveGHS05P234 P390 P406

Health hazards (H3xx)

CODESTATEMENT · CLASS & CATEGORYSIGNALPICTOGRAM · PAIRED P-CODES
H300Fatal if swallowed.Acute toxicity, oral · Categories 1 and 2DangerGHS06 ToxicGHS06P264 P270 P301 P310 P321 P330 P405 P501H301Toxic if swallowed.Acute toxicity, oral · Category 3DangerGHS06 ToxicGHS06P264 P270 P301 P310 P321 P330 P405 P501H302Harmful if swallowed.Acute toxicity, oral · Category 4WarningGHS07 HarmfulGHS07P264 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 1DangerGHS08 Health hazardGHS08P301 P310 P331 P405 P501H310Fatal in contact with skin.Acute toxicity, dermal · Categories 1 and 2DangerGHS06 ToxicGHS06P262 P264 P270 P280 P302 P310 P321 P352 P361 P364 P405 P501H311Toxic in contact with skin.Acute toxicity, dermal · Category 3DangerGHS06 ToxicGHS06P280 P302 P312 P321 P352 P361 P364 P405 P501H312Harmful in contact with skin.Acute toxicity, dermal · Category 4WarningGHS07 HarmfulGHS07P280 P302 P312 P321 P352 P362 P364 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)DangerGHS05 CorrosiveGHS05P260 P264 P280 P301 P303 P304 P305 P310 P321 P330 P331 P338 P340 P351 P353 P361 P363 P405 P501H315Causes skin irritation.Skin irritation · Category 2WarningGHS07 HarmfulGHS07P264 P280 P302 P313 P321 P332 P352 P362 P364H316Causes mild skin irritation.Skin irritation · Category 3 (mild irritation)Warning—H317May cause an allergic skin reaction.Skin sensitization · Category 1 (1A, 1B)WarningGHS07 HarmfulGHS07P261 P272 P280 P302 P313 P321 P333 P352 P362 P364 P501H318Causes serious eye damage.Serious eye damage · Category 1DangerGHS05 CorrosiveGHS05P280 P305 P310 P338 P351H319Causes serious eye irritation.Serious eye irritation · Category 2AWarningGHS07 HarmfulGHS07P264 P280 P305 P313 P337 P338 P351H320Causes eye irritation.Eye irritation · Category 2BWarning—P264 P305 P313 P337 P338 P351H330Fatal if inhaled.Acute toxicity, inhalation · Categories 1 and 2DangerGHS06 ToxicGHS06P233 P260 P271 P284 P304 P310 P320 P340 P403 P405 P501H331Toxic if inhaled.Acute toxicity, inhalation · Category 3DangerGHS06 ToxicGHS06P233 P261 P271 P304 P311 P321 P340 P403 P405 P501H332Harmful if inhaled.Acute toxicity, inhalation · Category 4WarningGHS07 HarmfulGHS07P261 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)DangerGHS08 Health hazardGHS08P261 P284 P304 P311 P340 P342 P501H335May cause respiratory irritation.Specific target organ toxicity, single exposure · Category 3 (respiratory tract irritation)WarningGHS07 HarmfulGHS07P233 P261 P271 P304 P312 P340 P403 P405 P501H336May cause drowsiness or dizziness.Specific target organ toxicity, single exposure · Category 3 (narcotic effects)WarningGHS07 HarmfulGHS07P233 P261 P271 P304 P312 P340 P403 P405 P501H340May cause genetic defects.Germ cell mutagenicity · Category 1 (1A, 1B)DangerGHS08 Health hazardGHS08P201 P202 P280 P308 P313 P405 P501H341Suspected of causing genetic defects.Germ cell mutagenicity · Category 2WarningGHS08 Health hazardGHS08P201 P202 P280 P308 P313 P405 P501H350May cause cancer.Carcinogenicity · Category 1 (1A, 1B)DangerGHS08 Health hazardGHS08P201 P202 P280 P308 P313 P405 P501H351Suspected of causing cancer.Carcinogenicity · Category 2WarningGHS08 Health hazardGHS08P201 P202 P280 P308 P313 P405 P501H360May damage fertility or the unborn child.Reproductive toxicity · Category 1 (1A, 1B)DangerGHS08 Health hazardGHS08P201 P202 P280 P308 P313 P405 P501H361Suspected of damaging fertility or the unborn child.Reproductive toxicity · Category 2WarningGHS08 Health hazardGHS08P201 P202 P280 P308 P313 P405 P501H370Causes damage to organs.Specific target organ toxicity, single exposure · Category 1DangerGHS08 Health hazardGHS08P260 P264 P270 P308 P311 P321 P405 P501H371May cause damage to organs.Specific target organ toxicity, single exposure · Category 2WarningGHS08 Health hazardGHS08P260 P264 P270 P308 P311 P405 P501H372Causes damage to organs through prolonged or repeated exposure.Specific target organ toxicity, repeated exposure · Category 1DangerGHS08 Health hazardGHS08P260 P264 P270 P314 P501H373May cause damage to organs through prolonged or repeated exposure.Specific target organ toxicity, repeated exposure · Category 2WarningGHS08 Health hazardGHS08P260 P314 P501

Environmental 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 1WarningGHS09 EnvironmentGHS09P273 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 1WarningGHS09 EnvironmentGHS09P273 P391 P501H411Toxic to aquatic life with long lasting effects.Hazardous to the aquatic environment — chronic · Category 2No signal wordGHS09 EnvironmentGHS09P273 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 P501

Reference information, not legal or professional advice. Statement texts and allocations follow 29 CFR 1910.1200 Appendix C (the GHS as adopted by OSHA HazCom 2024) 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, it assigns the hazard statements, signal word, pictograms, and precautionary statements from these same tables — automatically, with the calculation shown.