Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

The ready biodegradation of reaction mass of 2,2'-oxybisbutane (DSBE), DIPE, SBA and 2-methylpropan-2-ol (TBA) was tested according to ISO 14593:2005 under GLP. No significant degradation (14%) of the test item was observed after 28 days. Reaction mass of 2,2'-oxybisbutane (DSBE), DIPE, SBA and 2-methylpropan-2-ol (TBA) is not readily biodegradable.

This finding is corroborated by the degradabilities of the main constituents of reaction mass of 2,2'-oxybisbutane (DSBE), DIPE, SBA and 2 -methylpropan-2 -ol (TBA): While SBA, which, however, makes up only approximately 2.7% of the reaction mass, was found to be readily biodegradable (3), the components DSBE (1), DIPE (2), and TBA (4) were not readily biodegradable. However, TBA may be inherently biodegradable.

References:

(1) HIGH PRODUCTION VOLUME (HPV) CHEMICAL CHALLENGE PROGRAM TEST PLAN For sec-Butyl Ether CAS NO. 6863-58-7, Prepared by: ExxonMobil Chemical Company November 28,2006

(2) Stone CM, Watkinson RJ (1983) ISOPROPYL ETHER: AN ASSESSMENT OF READY BIODEGRADABILITY, Shell biosciences Laboratory, Sittingbourne Research Centre, Sittingbourne, Kent, U.K., Report No. SBGR.83.428

(3) OECD SIDS Dossier for Butan-2 -ol, CAS No. 78 -92 -2, ExxonMobil Biomedical Sciences Inc., 09.01.2002

(4) Robust Summaries for t-Butanol, CAS Number 75 -65 -O USEPA HPV Challenge Program Submission April 10, 2002