Registration Dossier

Environmental fate & pathways

Biodegradation in water: screening tests

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

C12-14 ADMAES was readily biodegradable in an OECD guideline study.

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

A guideline study was conducted to determine the ultimate ready biodegradability of C12-14 ADMAES using the headspace CO2 biodegradation test. The test substance at 20.15 mg/L was incubated with sludge from an activated sludge plant treating predominantly domestic waste. The extent of biodegradation was expressed as a percentage of the theoretical maximum inorganic carbon (IC) production (ThIC), based on the quantity of the test substance (as organic carbon) added initially over a period of 28 days. The test substance reached a biodegradation of 67.77% at Day 28. Mean net CO2 values from the test substance vessels on Days 3, 7, 14, 21 and 28 were 10.25, 30.31, 56.30, 63.98, and 67.77%, respectively, of the theoretical amount. The 10-day window pass criterion is not applicable for UVCB surfactant substances. Under the study conditions the test substance is readily biodegradable (Nadai RDE, 2001).