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Symbol of fish and plants in a red diamond-shaped warning border

This is the symbol that will appear on chemicals which are acutely hazardous to fish, crustacea, or aquatic plants.

This chart summarizes the hazard criteria for the category(s) in each class for the environment pictogram to appear on a pesticide product label. It also lists the corresponding hazard statement and signal word that will accompany the pictogram. This information is for illustrative purposes only; please consult the official GHS text for complete information.

Hazard Class/ Category


Hazard Communication Elements

Acute Toxicity


1. For substances and tested mixtures:
L(E)C50 ≤ 1mg/1 where L(E)C50 is either fish 96hr LC50, crustacea 48hr EC LC50 or aquatic plant 72 or 96hr ErC50.

2. If data for a mixture are not available, use bridging principles (see Exit EPA disclaimer

3. If bridging principles do not apply,

(a) For mixtures with classified ingredients: The summation method (see Exit EPA disclaimer reveals:
  • [Concentration of Acute 1] × M > 25% where M is a multiplying factor (see Exit EPA disclaimer
(b) For mixtures with tested ingredients:
The additivity formula (see and Exit EPA disclaimer reveals:
  • L(E)C50 ≤ 1mg/l.
(c) For mixtures with both classified and tested ingredients: The combined additivity formula and summation method (see to Exit EPA disclaimer reveal:
  • Concentration of Acute 1 × M > 25%.

4. For mixtures with no usable information for one or more relevant ingredients, classify using the available information and add the statement: “x percent of the mixture consists of component(s) of unknown hazards to the aquatic environment”.



Symbol will appear on chemicals which are acutely hazardous to fish, crustacea, or aquatic plants

Signal Word


Hazard Statement

Very toxic to aquatic life



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