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EC number: 246-186-9
CAS number: 24347-58-8
Ready biodegradation: readily biodegradable by micro-organisms,
fulfilling all criteria (OECD 301F): 91.0±2.1% degradation within 28 days
Simulation tests in surface water, sludge, soil and sediment: Data
In the reliable key study, the test item 2,3
-butanediol((2R,3R)-rich) was investigated to determine the ready
biodegradability over a period of 28 days in accordance with OECD
Guidelines (Test No. 301 Ready Biodegradability, 301 F) and in
compliance with GLP. The secondary effluent of a treatment plant
(Jin-ju munsan public sewage treatment facility, Republic of
Korea) was used as the inoculum. After collection, it was kept
aerobic during transport and coarse particles were removed by
settling for 1 hour.
The results were as follows: The percentage microbial degradation
of the reference item was 86.1% after 14 days, thus confirming
suitability of the inoculum. In the toxicity control, the
percentage microbial degradation was 70.6% at 14 days, thus it was
confirmed that the test item had obviously no inhibitory effect on
the activity of the inoculum. In the test suspensions, the
percentage microbial degradation of the test item was 84.7% at the
end of the 10-d window (after 11.6 days) and was 91.0% at end of
the test (28 days).
Therefore, 2,3-butanediol((2R,3R)-rich) was classified as readily
degradable by micro-organisms in the aquatic environmental
according to the pass level of biodegradability specified by the
OECD 301F (1992).
Simulation tests in surface water, sludge, soil and sediment
In accordance with column 2 of REACH Annex IX, the studies do not need
to be conducted if the substance is readily biodegradable. This is the
case for the submission substance.
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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