Physical hazard · Flammable solids
H228 — Flammable solid
Physical hazard statements describe what the substance itself can do — explode, ignite, react, corrode metal. 26 substances with a harmonised EU classification carry this code.
01 · Wording
What H228 says
Flammable solid.
CLP Annex III · Physical hazards
Flammable solids GHS chapter 2.7
Category 2, 1 · pictogram GHS02 (flame) · signal word Warning
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 H228 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 H228 |
|---|---|---|
| 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 H228
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, 5 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.
- (Z)-2-methoxymino-2-[2-(tritylamino)thiazol-4-yl]acetic acid CAS 64485-90-1
- [N-(1,1-dimethylethyl)-1,1-dimethyl-1-[(1,2,3,4,5-η)-2,3,4,5-tetramethyl-2,4-cyclopentadien-1-yl]silanaminato(2-)-κN][(1,2,3,4-η)-1,3-pentadiene]-titanium CAS 169104-71-6
- 1,3,5-trioxan; trioxymethylene CAS 110-88-3
- 2-(2-hydroxy-3,5-dinitroanilino)ethanol CAS 99610-72-7
- aluminium-tri-isopropoxide CAS 555-31-7
- ammonium (Z)-α-methoxyimino-2-furylacetate CAS 97148-39-5
- bis(3,5-di-tert-butylsalicylato-O1,O2)zinc CAS 42405-40-3
- bis(N-hydroxy-N-nitrosocyclohexylaminato-O,O’)copper; bis(N-cyclohexyl-diazenium-dioxy)-copper; [Cu-HDO] CAS 312600-89-8
- bis(η5-cyclopentadienyl)-bis(2,6-difluoro-3-[pyrrol-1-yl]-phenyl)titanium CAS 125051-32-3
- carbadox (INN); methyl 3-(quinoxalin-2-ylmethylene)carbazate 1,4-dioxide; 2-(methoxycarbonylhydrazonomethyl)quinoxaline 1,4-dioxide CAS 6804-07-5
- cis-1-(3-chloroallyl)-3,5,7-triaza-1-azoniaadamantane chloride CAS 51229-78-8
- diphosphorus pentasulphide; phosphorus pentasulphide CAS 1314-80-3
- magnesium, powder or turnings Index No 012-002-00-9
- metaldehyde (ISO); 2,4,6,8-tetramethyl- 1,3,5,7-tetraoxacyclooctane CAS 108-62-3
- methenamine; hexamethylenetetramine CAS 100-97-0
- pentachlorobenzene CAS 608-93-5
- poly-(methyl methacrylate)-co-(butylmethacrylate)-co-(4-acryloxybutyl-isopropenyl-α, α-dimethylbenzyl carbamate)-co-(maleicanhydride) Index No 607-415-00-1
- potassium (oxido-NNO-azoxy)cyclohexane; cyclohexylhydroxydiazene 1-oxide, potassium salt; [K-HDO] CAS 66603-10-9
- potassium mu-fluoro-bis(triethylaluminium) CAS 12091-08-6
- R,R-2-hydroxy-5-(1-hydroxy-2-(4-phenylbut-2-ylamino)ethyl)benzamide hydrogen 2,3-bis(benzoyloxy)succinate Index No 612-114-00-3
- reaction product of: (2-hydroxy-4-(3-propenoxy)benzophenone and triethoxysilane) with (hydrolysis product of silica and methyltrimethoxysilane) Index No 014-022-00-3
- red phosphorus CAS 7723-14-0
- sodium 2-ethylhexanolate CAS 38411-13-1
- sodium((n-butyl)x(ethyl)y-1,5-dihydro)aluminate) x = 0,5, y = 1,5 Index No 013-009-00-X
- tetrakis(trimethylhexadecylammonium) hexa-mu-oxotetra-mu3-oxodi-mu5-oxotetradecaoxooctamolybdate(4-) CAS 116810-46-9
- tetraphosphorus trisulphide; phosphorus sesquisulphid CAS 1314-85-8
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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.