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Studies on the aquatic toxicity of palmitic acid (CAS 57-10-3) are available for all three trophic levels (fish, invertebrates and algae).

All studies resulted in no toxicity up to the limit of water solubility of the test substance. A study on the chronic toxicity of palmitic acid to fish is not available. However, since all other short-term and chronic toxicity tests yielded no evidence of toxic effects of palmitic acid to aquatic organisms, chronic toxicity to fish is not expected and the endpoint is waived.