Response · precautionary statement
P342 — If experiencing respiratory symptoms:
Response statements describe what to do once exposure, a spill or a fire has happened. 27 substances with a harmonised EU classification carry this code.
01 · Wording
What P342 says
If experiencing respiratory symptoms:
Response · GHS revision 9
02 · Legal status
Where P342 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 P342 |
|---|---|---|
| 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 · On a label
P342 usually appears combined
CLP Annex IV defines combined statements as single label elements. P342 is a component of one of them — this is how you will actually see it printed.
| Code | Combined statement |
|---|---|
| P342+P311 | If experiencing respiratory symptoms: call a POISON CENTER or doctor. CLP verbatim: If experiencing respiratory symptoms: Call a POISON CENTER/doctor/… |
04 · Substances
Substances carrying P342
Every entry whose harmonised CLP Annex VI classification includes this precautionary statement. Substances with a reference page here open on this site; the rest open on ghssymbols.com. Of these, 4 are group entries such as “beryllium compounds” or “salts of hydrazine” — Annex VI gives them no CAS number, so they are listed by Index No and have no page of their own.
- (1S,3S,5R,6R)-(4-nitrophenylmethyl)-1-dioxo-6-phenylacetamido-penam-3-carboxylate CAS 54275-93-3
- (1S,4R,6R,7R)-(4-nitrophenylmethyl)3-methylene-1-oxo-7-phenylacetamido-cepham-4-carboxylateido-penam-3-carboxylate CAS 76109-32-5
- 2-(isocyanatosulfonylmethyl)benzoic acid methyl ester; (alt.):methyl 2-(isocyanatosulfonylmethyl)benzoate CAS 83056-32-0
- 2,2,4-trimethylhexamethylene-1,6-di-isocyanate [1]; 2,4,4-trimethylhexamethylene-1,6-di-isocyanate [2] CAS 16938-22-0[1]15646-9
- 4-chlorophenylisocyanate CAS 104-12-1
- 4-isocyanatosulphonyltoluene; tosyl isocyanate CAS 4083-64-1
- 8,9-dinorborn-5-ene-2,3-dicarboxylic anhydride CAS 123748-85-6
- amylase, α- CAS 9000-90-2
- amylases with the exception of those specified elsewhere in this Annex Index No 647-016-00-X
- bromelain, juice CAS 9001-00-7
- C,C'-azodi(formamide) CAS 123-77-3
- cellobiohydrolase, exo- CAS 37329-65-0
- cellulase CAS 9012-54-8
- cellulases with the exception of those specified elsewhere in this Annex Index No 647-004-00-4
- chymotrypsin CAS 9004-07-3
- ficin CAS 9001-33-6
- glucosidase, β- CAS 9001-22-3
- laccase CAS 80498-15-3
- papain CAS 9001-73-4
- pepsin A CAS 9001-75-6
- proteases with the exception of those specified elsewhere in this Annex Index No 647-014-00-9
- proteinase, microbial neutral CAS 9068-59-1
- rennin CAS 9001-98-3
- subtilisin CAS 9014-01-1
- tetrasodium 5-(4,6-dichloro-5-cyanopyrimidin-2-ylamino)-4-hydroxy-2,3-azodinaphthalene-1,2,5,7-disulphonate Index No 016-036-00-5
- tosylchloramide sodium CAS 127-65-1
- trypsin CAS 9002-07-7
Nothing matches that filter.
All precautionary statements
The full list of P-codes with the jurisdiction switch lives on the precautionary statements hub. For the hazard side, see hazard statements (H-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.