EU-specific statement
EUH031 — Contact with acids liberates toxic gas
EUH statements are supplementary European elements with no UN GHS equivalent — they appear on EU labels only. 21 substances with a harmonised EU classification carry this code.
01 · Wording
What EUH031 says
Contact with acids liberates toxic gas.
CLP Annex III · EU-specific statements
02 · Legal status
Where EUH031 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 EUH031 |
|---|---|---|
| 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) | not in this system |
| US HazCom 2012 | legacy · GHS Rev.3 UN GHS Rev.3, Annex 3 | not in this system |
| UN GHS | Rev.11 (2025) UN GHS Rev.11, Annex 3 | not in this system |
Currently in force under: EU CLP. Sources: EU CLP · US OSHA HazCom · US HazCom 2012 · UN GHS
03 · Substances
Substances carrying EUH031
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.
- ammonium polysulphides CAS 9080-17-5
- barium polysulphides CAS 50864-67-0
- barium sulphide CAS 21109-95-5
- calcium hypochlorite CAS 7778-54-3
- calcium polysulphides CAS 1344-81-6
- calcium sulphide CAS 20548-54-3
- di(benzothiazol-2-yl) disulphide CAS 120-78-5
- dichloro-1,3,5-triazinetrione; dichloroisocyanuric acid CAS 2782-57-2
- dipotassium sulphide; potassium sulphide CAS 1312-73-8
- metam-sodium (ISO); sodium methyldithiocarbamate CAS 137-42-8
- potassium polysulphides CAS 37199-66-9
- sodium dithionite; sodium hydrosulphite CAS 7775-14-6
- sodium hydrogensulphite … %; sodium bisulphite … % CAS 7631-90-5
- sodium hypochlorite CAS 7681-52-9
- sodium metabisulphite CAS 7681-57-4
- sodium polysulphides CAS 1344-08-7
- sodium selenite CAS 10102-18-8
- symclosene; trichloroisocyanuric acid; trichloro-1,3,5-triazinetrion CAS 87-90-1
- tosylchloramide sodium CAS 127-65-1
- troclosene potassium [1]; troclosene sodium [2] CAS 2244-21-5[1]2893-78-
- troclosene sodium, dihydrate CAS 51580-86-0
Nothing matches that filter.
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.