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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Description of key information

Hydrolysis product: 2-Ethylhexanoic acid: Acutely harmful to aquatic invertebrates.
Hydrolysis product: HCl: Acutely very toxic to aquatic invertebrates.

Key value for chemical safety assessment

EC50/LC50 for freshwater invertebrates:
85.4 mg/L

Additional information

No data on the toxicity of 2 -ethylhexanoyl chloride is available. However, since the test substance rapidly hydrolyses in water invertebrates are mainly exposed to the hydrolysis product, 2 -ethylhexanoic acid.

A study performed by BASF AG (1988; Report No. 2/0949/2/88 -0949/88) showed that 2 -ethylhexanoic acid is acutely harmful to Daphnia magna in a 48 hour exposure scenario (48 -h EC50 = 85.4 mg/L).

The hydrolysis product hydrochloric acid (HCl) was tested in a semi-static acute toxicity test according to OECD 202 with Daphnia magna. The 48-h EC50 was 0.492 mg/L (acid equivalent to pH 5.3; OECD 2002).