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.
At a glance
| Official statement | May be fatal if swallowed and enters airways. |
| Hazard class | Aspiration hazard |
| Category | Category 1 |
| Signal word | Danger |
| Pictogram |  GHS08 — Health hazard |
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 or a container label for a product carrying H304, these are the P-codes it assigns, in the official Annex 3 groups:
Substances that carry H304
233 of the 4,225 substances in our database carry H304 when classified in pure form — recognizable examples:
- toluene — CAS 108-88-3
- n-hexane — CAS 110-54-3
- d-limonene — CAS 5989-27-5
- turpentine, oil — CAS 8006-64-2
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.