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Short-term toxicity to fish

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Description of key information

Parent compound 2 -ethylhexanoyl chloride: Acutely harmful to fish.

Key value for chemical safety assessment

Fresh water fish

Fresh water fish
Dose descriptor:
Parent compound: 2 -ethylhexanoyl chloride
Effect concentration:
66.3 mg/L

Additional information

Parent compound: 2 -ethylhexanoyl chloride

The acute toxicity on fish was studied according to OECD 203 with Danio rerio under static conditions (BASF AG, 1998). The test item hydrolyses rapidly and forms 2-ethylhexanoic acid (CAS 149-57-5) and hydrochloric acid (HCl, CAS 7647 -01 -0). Therefore, the analytical verification of the test item concentrations was based on the hydrolysis product 2 -ethylhexanoic acid. The test item concentrations were initially in the range of 63.8% to 94.8% and after about 96 h between 43% and 86.2%. All fish died at the two highest test item concentration during the first day (nominal: 464 and 1000 mg/L; 1000 mg/L, pH-adjusted). Mortality occurred also in the two lower test item concentrations (nominal: 100 and 215 mg/L). The LC50 was calculated based on the mean measured concentrations: 96 -h LC50 = 66.3 mg/L. In conclusion, valeric acid is considered to be acutely harmful to fish.