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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

The biodegradability of Benzenesulfonic acid, C10-13-alkyl derivs., compds. with triethanolamine (CAS no. 68411-31-4) was studied in a OECD 301 B (CO2 -evolution) test. For both the reference and test substance >60% degradation within the 10-day window was achieved. The test substance is readily biodegradable.

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable
Type of water:
freshwater

Additional information

Biodegradability of Benzenesulfonic acid, C10-13-alkyl derivs., compds. with triethanolamine (CAS no. 68411-31-4) was assessed in several laboratory studies. The Key Study by Brunswik-Titze (2004) evaluated the biodegradability of the test substance in an OECD 301 B (CO2 -evolution) test using activated sludge. The study was undertaken in accordance with GLP and highly reliable (Klimisch 1). The test substance was 101% degraded in 28 days (after acidification). On day 7 the mean degradation was already higher than 60%. In conclusion the test substance degraded more than 60% within the 10-day window and is readily biodegradable.

Supporting studies are as follows:

­  Supporting study by Schöberl (1992) was an OECD Guideline 301 A (DOC die away) test in accordance with GLP and highly reliable (Klimisch 1). The test substance was 94% degraded in 28 days. For both the reference and test substances >70% degradation within the 10-day window as achieved concluding that the test substance is readily biodegradable.

­  Supporting study by West (1996) was a screening test for a CO2 evolution study (Klimisch 2) using the read-across substance 2,2',2''-nitrilotriethanol (CAS 102-71-6). The read-across substance was rapidly and completely degraded (100%) within 5 days.

­  Supporting study by Gerike (1978) was a published study run for 19 days and in accordance with the modified screening study OECD TG 301 E (Klimisch 2) using the read-across substance 2,2',2''-nitrilotriethanol (CAS 102-71-6). The read-across substance was rapidly degraded (96%) within 19 days.

- Supporting study by Sasol (2002) was an OECD Guideline 301 B (CO2 evolution study) in accordance with GLP and reliable (Klimisch 2 for read-across). The read-across substance LAS-Na Salt (CAS number 68411-30-3) substance was degraded by 85% in 29 days. The test substance was readily biodegradable.