H304 — May be fatal if swallowed and enters airways
The GHS hazard statement for aspiration hazard, category 1. Here is what it means, the label elements that travel with it, and the substances that carry it.
What it means
Thin, low-viscosity liquids — typically hydrocarbon solvents and fuels — that can slip into the airways if swallowed or vomited, causing severe lung injury (chemical pneumonitis). This is why "do NOT induce vomiting" appears on these products.
Precautionary statements paired with H304
When the engine writes SDS Section 2 for a product carrying H304, these are the precautionary statements it assigns, with combined statements written as one line:
Substances that carry H304
233 of the 4,228 substances in our database carry H304 when classified in pure form — recognizable examples:
Reference information, not legal or professional advice. Statement texts and allocations follow 29 CFR 1910.1200 Appendix C (the GHS as adopted by OSHA HazCom 2024) 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, it assigns the hazard statements, signal word, pictograms, and precautionary statements from these same tables — automatically, with the calculation shown.