GHS hazard statement
H334
May cause allergy or asthma symptoms or breathing difficulties if inhaled (respiratory sensitizer)
GHS08 · Health hazard- Hazard group
- Health hazards
- Hazard class
- Respiratory sensitization
- Signal word
- Danger
What H334 means
H334 is the GHS (Globally Harmonized System) hazard statement “May cause allergy or asthma symptoms or breathing difficulties if inhaled (respiratory sensitizer).” It belongs to the Respiratory sensitization hazard class and appears in Section 2 of a Safety Data Sheet and on the product label when a substance or mixture meets the classification criteria for that class and category.
Where H334 applies, GHS assigns the signal word Danger and the GHS08 (Health hazard) pictogram. The exact signal word and pictogram set on a finished label come from the whole classification — the most severe endpoint drives the signal word, so a milder statement can be present without changing an already-Danger label.
Classifying a mixture for this hazard? Try the free Health hazard (sum-of-parts) calculator — it runs the GHS math for you, nothing stored.
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GHSLogic reads the hazard and precautionary statements straight off your supplier SDSs, classifies the whole mixture across every GHS endpoint, and drafts a review-ready SDS and labels.
Reference information, not a compliance determination. Actual label elements depend on the full classification of your specific substance or mixture and require review by a qualified professional.