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Long-term toxicity to aquatic invertebrates

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Description of key information

As indicated in the hydrolysis study acetone cyanhydrin hydrolyses rapidly within minutes to acetone and cyanide. Therefore the toxic principle is the cyanide ion. The hydrolysis products of acetone cyanhydrin were very toxic against aquatic invertebrates.

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Additional information

(Following quotation taken with kind permission from ECETOC JACC report no. 53; Cyanides of Hydrogen, Sodium and Potassium, and Acetone Cyanohydrin (CAS No. 74-90-8, 143-33-1-50-8 and 75-86-5):
Chronic studies for invertebrates ranged from 3.9 to 30
μg/l approximately.