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EC number: 250-705-4
CAS number: 31566-31-1
Readily biodegradable: 95 % (O2 consumption) after 28 d (OECD 301D)
Data on the ready
biodegradability of Stearic acid, monoester with glycerol (CAS
31566-31-1) are not available. Therefore, data on the ready
biodegradability of a structurally related analogue substance
(Glycerides, C14-18 mono- and di- (CAS 67701-33-1) is used as
read-across in accordance with Regulation (EC) No. 1907/2006, Annex XI,
1.5. The biodegradability of Glycerides, C14-18 mono- and di- (CAS
67701-33-1) was tested in a study conducted according to OECD guideline
301D (Richterich, 1991). This test was conducted under GLP conditions.
Activated sludge was exposed to the test substance for 28 days at 20°C,
and biodegradation measured by O2consumption. After 28 days, the test
substance reached 95% (2 mg/L test concentration) and 69% (5 mg/L test
concentration) biodegradation. Based on the results for the read-across
substance stearic acid, monoester with glycerol (CAS 31566-31-1) is
considered as readily biodegradable. Furthermore a test on the anaerobic
degradation of the substance is available (Birch, et al. 1989). The
estimated biodegradation is based on the net DIC formation. The test
substance was anaerobically biodegraded by 108 % when added as aqueous
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