Registration Dossier
Registration Dossier
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EC number: 948-047-4 | CAS number: -
Endpoint summary
Administrative data
Description of key information
A reliable biodegradation screening study was available on the read across substance, Fatty acids, C16-18, esters with ethylene glycol / 91031-31-1 / 292-932-1. At days 28 and 56 the percentage biodegradation was 61 and 75%, fulfilling the 60% biodegradation criteria.
According to “OECD Guidelines for the testing of chemicals – Revised introduction to the OECD guidelines for testing of chemicals, Section 3 – Part 1: Principles and strategies related to the testing of degradation of organic chemicals degradation” published by OECD (2006) the ready biodegradability data for mixtures of structurally similar chemicals should be evaluated carefully. For substances with different chain lengths the 10-day window should not be used for the interpretation of results. It is possible that a sequential biodegradation took place which might have led to a prolonged lag-Phase and therefore a slower biodegradation period although the test substance was biodegraded in a large amount after the test duration. In this case the pass level can be applied at 28 days and is therefore readily biodegradable (61% after 28 days).
Additional information
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