Biodegradation of Branched Alkylbenzene Sulfonates

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BIODEGRADATION OF BRANCHED ALKYLBENZENE SULFONATES Applicable to these current Stepan products: NINATE® 401 NINATE® 401A NINATE® 411 POLYSTEP® A-11 POLYSTEP® A-16 POLYSTEP® A-16-22 POLYSTEP® A-17 STEPANTAN® H-100 Biodegradation Information: Considerable information regarding the biodegradation characteristics of branched alkylbenzene sulfonates (BABS) is presently available in the literature. Although a number of studies have shown that BABS compounds will be completely biodegraded in the environment, biodegradation rates for these compounds are, in general, significantly slower than those exhibited by the linear alkylbenzene sulfonates (LAS). Primary biodegradation rates for BABS typically range between 75-85% in 30 to 40 days. Ultimate or complete breakdown using radio-labeled BABS has been shown to reach 98% in soil tests. References: * Swisher, R.D., "Surfactant Biodegradation", Vol. 18, 2nd Ed., Marcel Dekker, Inc., 1987, pp 424-451, 751-781. * Arthur D. Little, Inc., "Environmental and Human Safety of Major Surfactants, Volume 1. Anionic Surfactants, Part 1. Linear Alkylbenzene Sulfonates", Final Report to the Soap and Detergent Association, February, 1991. * Sweeney, W.A. and Anderson, R.G. "Biodegradability of Alkylbenzene Sulfonates", JAOCS, Vol. 66., No. 12, December 1989 pp 1844-1849. NINATE® ; POLYSTEP® ; STEPANTAN® are registered trademarks of Stepan Company. Last Update: 01/15/99 Revision reference: BI003.01 Nothing contained herein grants or extends a license, express or implied, in connection with patents, issued or pending, of the manufacturer or others. The information contained herein is based on the manufacturer's own study and the works of others. The manufacturer makes no warranties, expressed or implied, as to the accuracy, completeness, or adequacy of the information contained herein. The manufacturer shall not be liable (regardless of fault) to the vendee's employees, or anyone for any direct, special or consequential damages arising out of or in connection with the accuracy, completeness, adequacy or furnishing of such information..

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