H334 · Hazard statementMay cause allergy or asthma symptoms or breathing difficulties if inhaled
H334 is the GHS hazard statement “May cause allergy or asthma symptoms or breathing difficulties if inhaled”. It is used for Respiratory sensitization (chapter 3.4), Category 1, 1A, 1B. The English wording is the same as UN GHS Rev.11 in US OSHA, EU CLP and Canada. Canada’s official French text is “Peut provoquer des symptômes allergiques ou d'asthme ou des difficultés respiratoires par inhalation” and Mexico’s Spanish text is “Puede provocar síntomas de alergia o asma o dificultades respiratorias si se inhala”. The UN GHS Rev.11 label matrix lists 9 precautionary statements for it (UN only).
Heading text: UN GHS Rev.11 Annex 3. Wording can differ by jurisdiction; see the table below.
Wording by jurisdiction
UN GHS Rev.11
Same as UNMay cause allergy or asthma symptoms or breathing difficulties if inhaled
UN GHS Rev.11, Annex 3, Table A3.1.2, PDF p. 304
US OSHA HCS
Same as UNMay cause allergy or asthma symptoms or breathing difficulties if inhaled
29 CFR 1910.1200 App. C, matched by wording
EU CLP
Same as UNMay cause allergy or asthma symptoms or breathing difficulties if inhaled.
EU CLP (Reg. (EC) No 1272/2008), Annex III, Part 1
Canada (EN)
Same as UNMay cause allergy or asthma symptoms or breathing difficulties if inhaled
GHS Rev.7 Annex 3 Table A3.1
Canada (FR)
AdoptedPeut provoquer des symptômes allergiques ou d'asthme ou des difficultés respiratoires par inhalation
GHS Rev.7 Annex 3 Table A3.1
Mexico (ES)
AdoptedPuede provocar síntomas de alergia o asma o dificultades respiratorias si se inhala
Sensibilización respiratoria · 1, 1A, 1B
NOM-018-STPS-2015, DOF 9 October 2015, Apéndice C, Tabla C.2, PDF p. 31
Hazard classes and categories
- Respiratory sensitization (chapter 3.4) · Category 1, 1A, 1B
UN GHS Rev.11 Annex 3, sections 1 and 2
FRSensibilisation respiratoire (chapitre 3.4) · catégorie 1, 1A, 1B
ESSensibilización respiratoria · 1, 1A, 1B (NOM-018-STPS-2015)
Pictogram: Health hazard (GHS08)
UN GHS Rev.11 Annex 3, section 3. Pictogram rules can differ by jurisdiction; see the GHS pictogram guide.
Change in UN GHS Rev.11
No change to the wording or the hazard classes in Annex 3 compared with Rev.10.
Sources
Each cell in the table names the official table and page for H334. Full citations, links and revision notes for UN GHS Rev.11, US OSHA, EU CLP, Canada and Mexico: Sources and revision notes.
These are regulatory phrases for labels and safety data sheets. Check them against the official source for your jurisdiction before use.