Registration Dossier
Registration Dossier
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EC number: 292-927-4 | CAS number: 91031-27-5
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Readily biodegradable: 95.6% (CO2 evolution) in 28 days; read-across
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
Since no studies investigating the biodegradation of Fatty acids, C6-18, 2,2-dimethyl-1,3-propanediyl esters (CAS No. 91031-27-5) are available, in accordance to Regulation (EC) No 1907/2006, Annex XI, 1.5, a read across to the structurally most similar category member 2,2-dimethyl-1,3-propanediyl dioleate (CAS No. 42222-50-4) was conducted. Further justification is given within the endpoint summary in IUCLID section 6.1 and within the category justification in IUCLID section 13. In this case of read-across, the best suited (highest degree of structural similarity, nearest physico-chemical properties) read-across substance was used for the assessment. Nevertheless, as it can be seen in the data matrix of the category justification in section 13 and the overall summary, all reliable data in the category support the hazard assessment by showing a consistent pattern of results.
This key study was carried out with 2,2-dimethyl-1,3-propanediyl dioleate (CAS No. 42222-50-4), following the OECD Guideline 301 B (Häner, 2007). Activated sludge from the aeration tank of a municipal wastewater treatment plant was used as inoculum. During the 28-day test period, biodegradation reached 95.6%, based on CO2 evolution, and the 10-day window criterion was met.
Based on the result from a structurally related read-across substance (in accordance to Regulation (EC) No 1907/2006 Annex XI, 1.5) it can be concluded that Fatty acids, C6-18, 2,2-dimethyl-1,3-propanediyl esters is readily biodegradable according to the OECD criteria. As it can be seen in the data matrix of the category justification in section 13 and the overall summary, all reliable data in the category support the hazard assessment of each category member by showing a consistent pattern of results within the polyol esters category.
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