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Environmental fate & pathways

Biodegradation in water: screening tests

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The ready biodegradabity of the test compound was determined in two OECD 301 series tests, and the inherent biodegradability of its major degradation product was determined in a DIN EN 29888 part 25 test.

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In an OECD 301F test, biodegradation of CS-1246 ranged from 19% based on oxygen consumption, 22% based on CO2 evolution, and 23% based on DOC removal. In an OECD 301C test, biodegradation of CS-1246 ranged from 14% based on oxygen consumption, 30% based on DOC removal, and 100% based on chemical specific analysis. In a DIN EN 29888 part 25 test, 90% biodegradation of 2-amino-2-ethyl-1,3-propanediol (AEPD), a hydrolysis product of CS-1246, occurred within 7 days based on DOC analysis. These results indicate that CS-1246 meets the OECD criteria of inherent, primary biodegradability, and the hydrolysis product AEPD meets the criteria of inherent, ultimate biodegradability.