H304: May be fatal if swallowed and enters airways

Hazard class and category

Hazard class	Category	Pictogram	Signal word	UN transport class
Aspiration hazard	Category 1		Danger	—

What H304 means

Aspiration hazard is the danger of a liquid or solid entering the trachea and lower respiratory system directly through the mouth or nose, or indirectly through vomiting.

Aspiration can cause serious acute effects such as chemical pneumonia, lung damage and, in the worst cases, death. It is a concern mainly for low-viscosity liquids such as some hydrocarbons.

What to do

If the product is swallowed, do not induce vomiting. Call a poison center or doctor immediately and keep the person at rest, as set out in the SDS first-aid section.

This is general guidance for the hazard class. The safety data sheet for your product always takes precedence.

Precautionary statements for H304

The GHS lists these precautionary statements for this hazard. Which ones appear on a label depends on the supplier's classification.

Chemicals carrying H304

5 chemicals in our database. Classification comes from each chemical's primary GHS source, so a supplier's SDS may differ.

H304 frequently asked questions