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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

The biodegradability of Butanedioic acid, 2,3-dihydroxy- [R-(R*,R*)]-, C12-13-branched alkyl esters was assessed in a CO2 -evolution test according to the OECD 301B guideline (July 1992). The degradation extent of the test item was 64.2 % within 35 days after acidification. The degradation after 28 days was 54.0%. According to the Revised Introduction to the OECD Guidelines for Testing of Chemicals, Section 3 the test item can be classified as inherently biodegradable.

The BCFBAF version 3.01 programme of the EPI Suite software (v 4.10) was used to predict either a log BCF of 2.19 (BCF of 153 L/kg wet-wt) (linear C12 -component), 2.26 (BCF 181 L/kg wet-wet) (branched C12 -component), 1.78 (BCF 59.7 L/kg wet-wt) based on a regression estimate or a log BAF of - 0.01 (BAF of 0.966 L/kg wet-wt) (linear C12 -component), log BAF -0.01 (BAF = 0.972 L/kg wet-wt) (branched C12 - component), log BAF -0.04 (BAF = 0.91 L/kg wet-wt) (branched C13 - component) based on the Arnot-Gobas upper trophic model both using the smiles codes of Butanedioic acid, 2,3 -dihydroxy-[R-(R*,R*)]-C12 -linear alkyl esters, Butanedioic acid, 2,3 -dihydroxy-[R-(R*,R*)]-C12 -branched alkyl esters and Butanedioic acid, 2,3 -dihydroxy-[R-(R*,R*)]-C13 -branched alkyl ester representing Butanedioic acid, 2,3 -dihydroxy-[R-(R*,R*)]-C12 -13 -branched alkyl ester. Because the Arnot-Gobas upper trophic model takes also into account metabolism of the substance by the organism it is lower. The QSAR-data are supported by the results of the pharmacokinetics. Butanedioic acid, 2,3 -dihydroxy-[R-(R*,R*)]-C12 -13 -branched alkyl esters will be hydrolysed, absorbed and efficiently metabolised into water soluble metabolites, which is supported by the molecular structure of Butanedioic acid, 2,3 -dihydroxy-[R-(R*,R*)]-C12 -13 -branched alkyl esters and its physico-chemical properties.

The log Kocs of the test substance were estimated with the program US EPA EPI Suite (v 4.10), program component KOCWIN (v 2.00). Using a correlation based on molecular connectivity index, the log Koc were determined to be 3.8619 - 4.3832. Using a correlation based on Kow, the log Koc was 5.2755 and 5.8176. The high Koc values indicate a distinct potential of the test substance to accumulate in soil and sediment.The McCall classification scheme classifies the substances as immobile in soil (Koc > 5000).

Additional information