Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

From several ready biodegradability studies it is known that MCA is readily biodegradable. This is supported by results from inherent biodegradability studies (with MCA and SMCA).

MCA is biodegraded by micro-organisms which are capable of utilizing this compound as carbon and energy source. The biodegradation of MCA is initiated by an enzymatic cleavage of the carbon-halogen bond. The enzymes involved are induced by various chlorinated alkanoic acids. The known literature indicates that MCA is degraded in nature. The substance is classified as readily biodegradable and thus degradation in sediment and soil is considered not relevant since the sorption potential is low and water solubility is high.

One biodegradability study performed under anaerobic conditions (Egli, 1989) showed that MCA is also rapidly degradable under these conditions.

SMCA is also regarded readily biodegradable.

Additional information