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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

The inhibition of the degradation activity of activated sludge is not anticipated when introduced in appropriately low amounts.

Key value for chemical safety assessment

EC50 for microorganisms:
622 mg/L
EC10 or NOEC for microorganisms:
262 mg/L

Additional information

The effect of vinylcaprolactam on aquatic microorganisms was tested in a growth inhibition test on Pseudomonas putida according to German Industrial Standard DIN 38412, Part 8 (BASF 1993). The EC10 after 17 hours was 262 mg/L while the EC50 was estimated to be 622 mg/L.