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REACH

Asphalt, sulfonated, sodium salt

EC number: 269-212-0 | CAS number: 68201-32-1

Life Cycle description
Uses advised against

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Two studies have been performed to evaluate biodegradation of Soltex® containing 85% asphalt, sulfonated, sodium salt (SAS). Both studies were conducted according to EC guideline C.4-E, “Biotic Degradation in Seawater: Closed bottle Method”. This method is the most relevant based upon the use of SAS in drilling fluids used in the marine environment. Soltex® Shale Inhibitor demonstrated 3-6% biodegradation in seawater in 28 days (TNO, 1991) and no degradation in seawater in 56 days when mixed in a bentonite slurry (TNO, 1993). These results indicate that SAS is not readily biodegradable in water or sediment.

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