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EC number: 212-825-5
CAS number: 872-36-6
The test substance was evaluated for ready biodegradability in the
Closed Bottle test (OECD 301D) at the initial test concentrations of 3
and 6 mg/L. The relative biodegradation values calculated from the O2
measurements performed during the test period of 28 days revealed 22 and
24% degradation of VC at the low and high concentration respectively
(mean values on day 28). Thus, biodegradation of at least 60% was not
reached within 10 days of biodegradation exceeding 10% and so VC is
considered not readily biodegradable.
Two biodegradation screening tests were performed on VC. The two tests
give opposite results: readily biodegradable versus not readily
Although both studies, the MITI and the Closed Bottle Test, have been
performed without any demonstrative errors, the results are different.
Because in the MITI-test no indication is stated on the condition of the
activated sludge used, there is the possibility that the sludge was
adapted to the substance or similar substances, which may account for
the high degree of biodegradation.
The Closed Bottle Test was taken as the key study as both the condition
(non-adapted) of the activated sludge used in this study is confirmed
and the result represents a worst case situation.
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.
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