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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Toxicity to microorganisms

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Administrative data

Link to relevant study record(s)

Description of key information

IC50 3h > 100 mg/l

Key value for chemical safety assessment

EC50 for microorganisms:
100 mg/L

Additional information

The inhibitory effect of the substance under registration on aerobic waste-water bacteria was investigated in a respiration test, according to OECD Guideline for Testing of Chemicals No. 209. The test article showed only a slight inhibition (6.3 %) of the respiration rate up to a concentration of 100 mg/l, therefore the IC50 was determined > 100 mg/l (Ritter A., 1989).

For completeness sake, supporting studies were reported on analogous substance 3a-A(Na). Justification for Read Across is given in Section 13 of IUCLID.

All of those studies demonstrate that the substance does not inhibit the degradation activity of activated sludge in concentrations higher or equal to 100 mg/l.