Physical hazard · Flammable liquids
H225 — Highly flammable liquid and vapour
Physical hazard statements describe what the substance itself can do — explode, ignite, react, corrode metal. 133 substances with a harmonised EU classification carry this code.
01 · Wording
What H225 says
Highly flammable liquid and vapour.
CLP Annex III · Physical hazards
Flammable liquids GHS chapter 2.6
Category 2 · pictogram GHS02 (flame) · signal word Danger
Unchanged since 2009.
Present in every UN GHS edition from Rev.3 (2009) to Rev.11 (2025), with the same wording throughout.
Nine editions of the UN model text, 86 hazard statements, 19 of which ever moved. Read the full story in what changed in UN GHS Rev.11.
02 · Legal status
Where H225 is current
GHS is a United Nations model text, revised every two years, and each jurisdiction adopts a revision on its own timetable. A code can be legally current in one system and deleted in another — that is normal, not an error.
| Jurisdiction | Basis | Status of H225 |
|---|---|---|
| EU CLP | Regulation (EC) 1272/2008 CLP Annex IV, Part 2 (consolidated) | Current |
| US OSHA HazCom | 29 CFR 1910.1200 Appendix C UN GHS Rev.7 (final rule of 20 May 2024) | Current |
| US HazCom 2012 | legacy · GHS Rev.3 UN GHS Rev.3, Annex 3 | Current |
| UN GHS | Rev.11 (2025) UN GHS Rev.11, Annex 3 | Current |
Currently in force under: EU CLP, US OSHA HazCom, US HazCom 2012, UN GHS. Sources: EU CLP · US OSHA HazCom · US HazCom 2012 · UN GHS
03 · Substances
Substances carrying H225
Every entry whose harmonised CLP Annex VI classification includes this hazard statement. Substances with a reference page here open on this site; the rest open on ghssymbols.com. Of these, 3 are group entries such as “salts of picric acid” or “beryllium compounds” — Annex VI gives them no CAS number, so they are listed by Index No and have no page of their own.
- (S)-sec-butylamine; (S)-2-aminobutane [1]; (R)-sec-butylamine; (R)-2-aminobutane [2]; sec-butylamine; 2-aminobutane [3] CAS 513-49-5[1]13250-12-
- 1-bromopropane; n-propyl bromide CAS 106-94-5
- 1-chlorobutane; butyl chloride CAS 109-69-3
- 1-chloropentane [1]; 2-chloropentane [2]; 3-chloropentane [3] CAS 543-59-9[1]625-29-6[
- 1-chloropropane [1]; 2-chloropropane [2] CAS 540-54-5[1]75-29-6[2
- 1-methoxy-2-propylamine CAS 37143-54-7
- 1,1-dichloroethane CAS 75-34-3
- 1,1-dichloropropene CAS 563-58-6
- 1,1-diethoxyethane; acetal CAS 105-57-7
- 1,1-dimethoxyethane; dimethyl acetal CAS 534-15-6
- 1,1,1,3,3-pentafluorobutane CAS 406-58-6
- 1,1,3,3-tetramethylbutylperoxypivalate CAS 22288-41-1
- 1,2-dichloroethane; ethylene dichloride CAS 107-06-2
- 1,2-dichloroethylene [1]; cis-dichloroethylene [2]; trans-dichloroethylene [3] CAS 540-59-0[1]156-59-2[
- 1,2-dichloropropane; propylene dichloride CAS 78-87-5
- 1,2-diethoxyethane CAS 629-14-1
- 1,2-diethoxypropane CAS 10221-57-5
- 1,2-dimethoxyethane; ethylene glycol dimethyl ether; EGDME CAS 110-71-4
- 1,2-dimethoxypropane CAS 7778-85-0
- 1,2-epoxybutane CAS 106-88-7
- 1,3-dioxolane CAS 646-06-0
- 1,3-propylene oxide CAS 503-30-0
- 1,4-dimethylcyclohexane CAS 589-90-2
- 1,4-dioxane CAS 123-91-1
- 2-aminoethyldimethylamine; 2-dimethylaminoethylamine CAS 108-00-9
- 2-bromopropane CAS 75-26-3
- 2-methoxy-2-methylbutane; tert-amyl methyl ether CAS 994-05-8
- 2-methyl-3-(trimethoxysilyl)propyl-2-propenoate hydrolysis product with silica CAS 125804-20-8
- 2-methylaziridine; propyleneimine CAS 75-55-8
- 2-methylbutan-2-ol; tert-pentanol CAS 75-85-4
- 2-methylpropan-2-ol; tert-butyl alcohol CAS 75-65-0
- 2,3-dichloropropene; 2,3-dichloropropylene CAS 78-88-6
- 2,4-dimethylpentan-3-one; di-isopropyl ketone CAS 565-80-0
- 2,4,4-trimethylpent-1-ene CAS 107-39-1
- 2,4,4-trimethylpentene CAS 25167-70-8
- 3-chloro-2-methylpropene CAS 563-47-3
- 3-chloropropene; allyl chloride CAS 107-05-1
- 3-iodpropene; allyl iodide CAS 556-56-9
- 3-methylbutan-2-one; methyl isopropyl ketone CAS 563-80-4
- 3a,4,7,7a-tetrahydro-4,7-methanoindene CAS 77-73-6
- acetone CAS 67-64-1
- acetonitrile CAS 75-05-8
- acetyl chloride CAS 75-36-5
- acrolein; prop-2-enal; acrylaldehyde CAS 107-02-8
- acrylonitrile CAS 107-13-1
- allyl alcohol CAS 107-18-6
- allylamine CAS 107-11-9
- benzene CAS 71-43-2
- bis(chloromethyl) ether; oxybis(chloromethane) CAS 542-88-1
- bis(N-methyl-N-phenylhydrazine)sulfate CAS 618-26-8
- bromoethane; ethyl bromide CAS 74-96-4
- butyl (dialkyloxy(dibutoxyphosphoryloxy))titanium (trialkyloxy)titanium phosphate Index No 015-142-00-9
- butyl formate [1]; tert-butyl formate [2]; isobutyl formate [3] CAS 592-84-7[1]762-75-4[
- butyl nitrite CAS 544-16-1
- butylamine CAS 109-73-9
- butyraldehyde CAS 123-72-8
- butyryl chloride CAS 141-75-3
- carbon disulphide CAS 75-15-0
- chlormethyl methyl ether; chlorodimethyl ether CAS 107-30-2
- chloroprene (stabilised); 2-chlorobuta-1,3-diene (stabilised) CAS 126-99-8
- crotonaldehyde; 2-butenal [1]; (E)-2-butenal; (E)-crotonaldehyde [2] CAS 4170-30-3[1]123-73-9
- cyclohexane CAS 110-82-7
- cyclopentane CAS 287-92-3
- di-tert-butyl peroxide CAS 110-05-4
- diethylamine CAS 109-89-7
- diisopropyl ether [1]; dipropyl ether [2] CAS 108-20-3[1]111-43-3[
- diisopropylamine CAS 108-18-9
- dimethyl carbonate CAS 616-38-6
- dimethyl disulphide CAS 624-92-0
- dimethyldichlorosilane CAS 75-78-5
- dipropylamine CAS 142-84-7
- ethanol CAS 64-17-5
- ethyl acetate CAS 141-78-6
- ethyl acrylate CAS 140-88-5
- ethyl chloroformate CAS 541-41-3
- ethyl formate CAS 109-94-4
- ethyl methacrylate CAS 97-63-2
- ethyl propionate CAS 105-37-3
- ethylbenzene CAS 100-41-4
- ethyldimethylamine CAS 598-56-1
- ethyleneimine; aziridine CAS 151-56-4
- ethynyl cyclopropane CAS 6746-94-7
- heptane CAS 142-82-5[1]108-08-7[
- hexane CAS 110-54-3
- hexane (containing < 5 % n-hexane (203-777-6)); 2-methylpentane [1]; 3-methylpentane [2]; 2,2-dimethylbutane [3]; 2,3-dimethylbutane [4] CAS 107-83-5[1]96-14-0[2
- isobutyl nitrite CAS 542-56-3
- isobutyryl chloride CAS 79-30-1
- isopentyl formate [1]; pentyl formate [2] CAS 110-45-2[1]35073-27-
- isopropyl alcohol CAS 67-63-0
- isopropyl propionate CAS 637-78-5
- methacrylonitrile; 2-methyl-2-propene nitrile CAS 126-98-7
- methanol CAS 67-56-1
- methyl acetate CAS 79-20-9
- methyl acrylate; methyl propenoate CAS 96-33-3
- methyl chloroformate CAS 79-22-1
- methyl ethyl ketone CAS 78-93-3
- methyl isobutyl ketone CAS 108-10-1
- methyl isocyanate CAS 624-83-9
- methyl methacrylate CAS 80-62-6
- methyl propionate CAS 554-12-1
- methylcyclohexane CAS 108-87-2
- n-butyronitrile CAS 109-74-0
- N,N-dimethylhydrazine CAS 57-14-7
- N,N,N',N'-tetramethylethylenediamine CAS 110-18-9
- O-ethylhydroxylamine CAS 624-86-2
- octane; n-octane [1]; 2,2,4-trimethylpentane [2]; 2,3,3-trimethylpentane [3]; 3,3-dimethylhexane [4]; 2,2,3-trimethylpentane [5]; 2,3,4-trimethylpentane [6]; 3,4-dimethylhexane [7]; 2,3-dimethylhexane [8]; 2,4-dimethylhexane [9]; 4-methylheptane [10]; 3-methylheptane [11]; 2,2-dimethylhexane [12]; 2,5-dimethylhexane [13]; 2-methylheptane [14]; 2,2,3,3-tetramethylbutane [15]; 3-ethyl-2-methylpentane [16]; 3-ethylhexane [17]; 3-ethyl-3-methylpentane [18]; isooctane [19] CAS 111-65-9[1]540-84-1[
- pentan-3-one; diethyl ketone CAS 96-22-0
- pentane CAS 109-66-0
- pentyl nitrite [1]; ‘amyl nitrite’, mixed isomers [2] CAS 463-04-7[1]110-46-3[
- piperidine CAS 110-89-4
- propan-1-ol; n-propanol CAS 71-23-8
- propanal; propionaldehyde CAS 123-38-6
- propionyl chloride CAS 79-03-8
- propyl acetate [1]; isopropyl acetate [2] CAS 109-60-4[1]108-21-4[
- propyl chloroformate; chloroformic acid propylester; n-propyl chloroformate CAS 109-61-5
- propyl formate [1]; isopropyl formate [2] CAS 110-74-7[1]625-55-8[
- pyridine CAS 110-86-1
- reaction product of: 1,2,3-propanetricarboxylic acid, 2-hydroxy, diethyl ester, 1-propanol and zirconium tetra-n-propanolate Index No 650-045-00-0
- Reaction products of tungsten hexachloride with 2-methylpropan-2-ol, nonylphenol and pentane-2,4-dione Index No 074-002-00-5
- sec-butyl acetate [1]; isobutyl acetate [2]; tert-butyl acetate [3] CAS 105-46-4[1]110-19-0[
- sec-butyl nitrite CAS 924-43-6
- tert-butyl acrylate CAS 1663-39-4
- tert-butyl methyl ether; MTBE; 2-methoxy-2-methylpropane CAS 1634-04-4
- tert-butyl nitrite CAS 540-80-7
- tert-butyl propionate CAS 20487-40-5
- tetracarbonylnickel; nickel tetracarbonyl CAS 13463-39-3
- tetrahydrofuran CAS 109-99-9
- tetrahydrothiophene CAS 110-01-0
- toluene CAS 108-88-3
- trichloro(methyl)silane; methyltrichlorosilane CAS 75-79-6
- triethylamine CAS 121-44-8
- vinyl acetate CAS 108-05-4
- α,α,α-trifluorotoluene; benzotrifluoride CAS 98-08-8
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All hazard statements
The full list of H-codes with the jurisdiction switch lives on the hazard statements hub. For what to do about the hazard, see precautionary statements (P-codes).
Wording quoted from the regulation named above. Substance counts come from harmonised classifications in CLP Annex VI — the statements on a real product also depend on the supplier's own classification. Always check the supplier safety data sheet.