Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 293-215-6 | CAS number: 91052-54-9
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Readily biodegradable: 78% biodegradation in 28 days (ISO Draft BODIS test)
69-95% in 28 days (OECD 301D)
Key value for chemical safety assessment
Additional information
No experimental data evaluating the biodegradation potential of Glycerides, C16-18 mono-, di- and tri- (CAS No. 91052-54-9) are available. Therefore, biodegradation data from structurally related category members, docosanoic acid, ester with 1,2,3-propanetriol (CAS No. 77538-19-3) and 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). All three substances are esters formed from the combination of long-chain fatty acids (C16-C18, CAS No. 91052-54-9 and CAS No. 67701-33-1, and C20-24, CAS No. 77538-19-3) and glycerol, containing similar amounts of mono, di and triglycerides. As biodegradation tends to increase at decreasing C-chain lengths, reading across from docosanoic acid, ester with 1,2,3-propanetriol (CAS No. 77538-19-3) represents a worst-case scenario for the target substance and therefore it is justified.
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 O2 consumption. 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. On the other hand, one study evaluating the potential for ready biodegradability of docosanoic acid, ester with 1,2,3-propanetriol (CAS No. 77538-19-3) is available (Richterich and Mühlberg, 2001). The test was conducted according to ISO Draft BOD Test for Insoluble Substances, under GLP conditions. Activated sludge was exposed for 28 days to the test and biodegradation followed by measuring O2 consumption in the test vessels. After 28 days, the test substance reached 78% biodegradation. As the substance is an UVCB substance and thus consists of constituents with different degrees of esterification, sequential (instead of concurrent) biodegradation is expected to take place. Thus, referring to Annex I to the OECD Guideline for Testing of Chemicals ‘Revised introduction to the OECD guidelines for testing of chemicals, section 3’ (OECD, March 2006), the 10-day window criterion can be disregarded in this case and the substance considered as readily biodegradable.
Based on the results obtained for the structurally related category members (in accordance with Regulation (EC) No. 1907/2006, Annex XI, 1.5), Glycerides, C16-18 mono-, di- and tri- (CAS No. 91052-54-9) can be regarded as readily biodegradable.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
