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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

In a standardised ready biodegradability screening study (Rudio 1996), no toxicity was observed in an inhibition control at a test concentration of 100 mg/L. This concentration can be considered as a NOEC for the toxicity to STP microorganisms.

Key value for chemical safety assessment

EC10 or NOEC for microorganisms:
100 mg/L

Additional information

In the biodegradation study, the curves obtained with the reference substance alone and with the test substance + reference substance showed no toxic effect of the test substance to the microorganisms at the test concentration of 100mg/L. Furthermore, aldehyde C12 MNA was shown to be readily biodegradable at this test concentration (68% after 22 days, with the 10 day window criterion met), which also supports lack of toxicity to micro-organisms at the test concentration of 100mg/L.

Degradation of the reference substance, aniline, exceeded 60 % after 14 days. The activity of the inoculum was thus verified and the test is considered valid.