GHS hazard statement
H400
Very toxic to aquatic life
GHS09 · Environment- Hazard group
- Environmental hazards
- Hazard class
- Hazardous to the aquatic environment (acute)
- Signal word
- Danger
What H400 means
H400 is the GHS (Globally Harmonized System) hazard statement “Very toxic to aquatic life.” It belongs to the Hazardous to the aquatic environment (acute) 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 H400 applies, GHS assigns the signal word Danger and the GHS09 (Environment) 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.
Related statements — Hazardous to the aquatic environment (acute)
Classifying a mixture for this hazard? Try the free Aquatic toxicity calculator — it runs the GHS math for you, nothing stored.
Stop looking up codes by hand
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.