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EC number: 200-624-5
CAS number: 66-25-1
An acute toxicity (96h) assay on Feathed
minnow (Pimephales promelas) similar to OECD Guideline 203 was
conducted with the test item hexanal. 5 analytically verified
concentrations were tested on 20 fish per concentration. Effects
observed were loosing of schooling behaviour, swimming near the bottom,
hyperreactivity and underreactivity to external stimuli, increased
respiration and edema, and loosing of equilibrium prior to death. The
LC50 and EC50 after 96 h was determined. The study is well documented
and meets generally accepted scientific principle and is therefore
sufficient for the assessment.The EC50 (96 h) was 13.8 mg/L (confidence
limit: 11.9 - 16.0 mg/L) and the LC50 (96 h) was 14 mg/L (confidence
limit: 12 - 16.5 mg/L).
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