Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

BIODEGRADATION SCREENING TEST

The read-across substance Polyethylene glycol dibutyl ether (CAS No. 31885-97-9) is readily biodegradable. It is a mixture with Dibutyldiglycol (CAS No. 112-73-2, the registration substance), Dibutyltriglycol (CAS No. 63512-36-7) and Dibutyltetraglycol (CAS No. 112-98-1) as major constituents. This means that Polyethylene glycol dibutyl ether (CAS No. 31885 -97 -7) consists of C chain homologues of Dibutylglycols and it can be concluded that the registration substance Dibutyldigylcol itself is readily biodegradable as well.

BIODEGRADATION IN SEWAGE TREATMENT PLANTS

can be estimated with the Simpletreat STP model built in the EUSES Environmental exposure and risk model. Based on 'ready biodegradability' and inherent substance data like log Kow and Henry's Law constant the model calculates a 86% elimination by biodegradation in the Sewage treatment plant.

BIODEGRADATION IN FRESHWATER AND MARINE WATER

Based on 'ready biodegradability' the REACH Guidance R16.5.4 proposes a Half-life in Freshwater of 15d (12 deg C) and for Marine water of 50d (12 deg C).

BIODEGRADATION IN FRESHWATER SEDIMENT

Based on 'ready biodegradability and a Kd sediment of < 100 L/kg (see IUCLID Chaapter 5.4.1) the REACH Guidance R16.5.4 proposes Half-lives in Freshwater of 30d (aerobic freshwater sediment) and 300d (anaerobic freshwater sediment).

BIODEGRADATION IN SOIL

Based on 'ready biodegradability and a Kd soil of < 100 L/kg (see IUCLID Chapter 5.4.1) the REACH Guidance R16.5.4 proposes a Half-life in Soil of 30d (12 deg C).