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EC number: 823-920-1
CAS number: 5341-95-7
Hydrolysis: data waiving
Ready biodegradation: readily biodegradable by micro-organisms,
fulfilling all criteria (OECD 301F): 85.8±0.9% degradation within 28 days
Adsorption / desorption: data waiving; estimated Koc: 1 L/kg //
log Koc: -0.6584 (EPISuite KOCWIN v2.01)
Stability - Hydrolysis
In accordance with column 2 of REACH Annex VIII, the study does not need
to be conducted if the substance is readily biodegradable. This is the
case for the submission substance. In general, abiotic degradation by
hydrolysis of the submission substance is expected to be low as
indicated by the dissociation constant (IUCLID section 4.21).
In a reliable key study, the test item 2,3
-butanediol((2R,3S)-rich) was determined to be ready
biodegradability over a period of 28 days. Percentage microbial
degradation of the test item was 84.5% at the end of the 10-d
window (11.5 days) and was 85.8% at end of the test (28 days).
Therefore, the submission substance is expected to fast disappear
in case of release and environmental exposure will be vegetable.
Transport and distribution - Adsorption / desorption
In accordance with column 2 of REACH Annexes VIII and IX, the study does
not need to be conducted if based on the physicochemical properties the
substance can be expected to have a low potential for adsorption (e.g.
the substance has a low octanol water partition coefficient), or the
substance and its relevant degradation products decompose rapidly. This
is the case for the submission substance.
The estimated Koc is calculated at 1 L/kg or 0.5058 L/kg by the MCI or
Kow method, respectively (EPISuite KOCWIN v2.01, exp. log Kow: -0.81).
Based on the low log Kow and estimated Koc value, the submission
substance is not expected to adsorb to soil and sediment.
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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