Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Biodegradation in water: screening tests

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

The ready biodegradation of MTBAC under the conditions of the carbon dioxide (CO2) evolution test (modified Sturm test) was investigated according to OECD guideline 301B and GLP principles. No significant biodegradation of MTBAC was observed. Therefore it is concluded that the substance was not readily biodegradable under the conditions of the modified Sturm test presently performed.

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information

A single test concentration of 18mg/L (12 mg TOC/L) was tested during 28 days.

Max. 8% biodegradation of MTBAC was observed after 28d.

In the toxicity control more than 25% biodegradation of the reference substance occurred within 14 days (40%, based on ThCO2) indicating that the test substance does not inhibit microbial activity at a nominal concentration of 18 mg/L.

The study is considered to be reliable without restrictions.