P342 — If experiencing respiratory symptoms:

A response statement from GHS Annex 3 — the precautionary half of the label language on SDSs and containers.

At a glance

Official statement	If experiencing respiratory symptoms:
Group	Response (P3xx)

The trailing colon is not a typo: P342 is a condition stem. On sheets and labels it prints combined with the response steps that follow it — for example "P303+P361+P353" reads as one instruction.

Which hazards call for P342

Our engine assigns P342 whenever a product carries any of these hazard statements:

H334	May cause allergy or asthma symptoms or breathing difficulties if inhaled.

Reference information, not legal or professional advice. Statement texts and allocations follow GHS Rev 9 / 29 CFR 1910.1200 Appendix C as implemented by our classification engine; the regulatory text and agency practice control. Claims last reviewed July 23, 2026.

The engine writes these for you.

When SDS HQ authors an SDS or a container label, it assigns the hazard statements, signal word, pictograms, and precautionary statements from these same tables — automatically, with the calculation shown.

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