H411 — Toxic to aquatic life with long lasting effects
The GHS hazard statement for hazardous to the aquatic environment — chronic, category 2. Here is what it means, the label elements that travel with it, and the substances that carry it.
What it means
Harmful to aquatic life over longer exposures, factoring in whether the substance degrades or accumulates. Environmental classes appear on SDSs and labels, but in the US they sit with EPA and DOT rather than OSHA.
Precautionary statements paired with H411
When the engine writes SDS Section 2 or a container label for a product carrying H411, these are the P-codes it assigns, in the official Annex 3 groups:
Substances that carry H411
481 of the 4,228 substances in our database carry H411 when classified in pure form — recognizable examples:
Reference information, not legal or professional advice. Statement texts and allocations follow GHS Rev 9 / 29 CFR 1910.1200 Appendix C 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 or a container label, it assigns the hazard statements, signal word, pictograms, and precautionary statements from these same tables — automatically, with the calculation shown.