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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

Polyseed broad spectrum micro-organism mix: EC50=36000mg/l, NOEC/EC10=5000mg/l (16hr)
Sewage sludge microorganisms. EC50>10000mg/l

Key value for chemical safety assessment

EC50 for microorganisms:
36 000 mg/L
EC10 or NOEC for microorganisms:
7 500 mg/L

Additional information

No data is available for the the UVCB substance itself. Studies are available on sewage sludge micro-organisms and a broad spectrum micro-organism mixtures for the major component 2-(2-(2-ethoxyyethoxy)ethoxy)ethanol which show that the substance is practically non-toxic to micro-organisms. The data for the other aquatic toxicity end point shows that the other major component, 3,6,9,12-tetraoxatetradecan-1-ol is less toxic than this read across surrogate so it seems an acceptable conservative approach to use data from 2-(2-(2-ethoxyethoxy)ethoxy)ethanol in place of absent data for the UVCB substance itself.

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