Registration Dossier
Registration Dossier
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EC number: 267-057-3 | CAS number: 67784-87-6
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Readily biodegradable: 69-95% in 28 days (equivalent to OECD 301D)
Key value for chemical safety assessment
Additional information
No experimental data evaluating the biodegradation potential of Glycerides, palm-oil mono- and di-, hydrogenated (CAS No. 67784-87-6) are available. Therefore, biodegradation data from a structurally related category member, Glycerides, C14-18 mono- and di- (CAS No. 67701-33-1) are used as read-across in accordance with Regulation (EC) No. 1907/2006, Annex XI, 1.5. Both substances are esters formed from the combination between fatty acids and glycerol, containing mainly C16 and C18 fatty acids. They are predominantly mono and diglycerides (triglyceride content of CAS No. 67701-33-1 up to 15%). Based on their structural similarity, their degree of biodegradation is expected to be comparable and therefore, read-across is considered justified between Glycerides, C14-18 mono- and di- and Glycerides, palm-oil mono- and di-, hydrogenated.
A study evaluating the potential for ready biodegradability of Glycerides, C14-18 mono- and di- (CAS No. 67701-33-1) is available (Richterich, 1991). This test was conducted according to a method equivalent to OECD Guideline 301D, 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. Therefore, Glycerides, C14-18 mono- and di- is readily biodegradable.
Based on the results obtained for the structurally related analogue substance (in accordance with Regulation (EC) No. 1907/2006, Annex XI, 1.5), Glycerides, palm-oil mono- and di-, hydrogenated (CAS No. 67784-87-6) can be regarded as readily biodegradable.
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