Registration Dossier
Registration Dossier
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EC number: 211-754-7 | CAS number: 693-57-2
Endpoint summary
Administrative data
Description of key information
Additional information
Hydrolysis
In accordance with Column 2 of REACH Annex VIII, the hydrolysis study (as required under Section 9.2.2.1) is not required as the substance is readily biodegradable.
Biodegradation
Biodegradation in water: screening tests
The substance is readily biodegradable (O2 consumption, 97.3% degradation after 14 days (Kitano, 1985, according to 1973, Law No.117, Japan; specifically, Section 7-1 "Method for Testing the Biodegradability Of Chemical Substances by Microorganisms).
The study was non-GLP and conducted to a non-standard test method. However the reporting is adequate and result is conclusive so it considered acceptable as a standalone study. The study was assigned a reliability score of 2 according to the principles for assessing data quality set out in Klimisch (1997) and is considered suitable for assessment as an accurate reflection of the test material.
Volatilisation
The calculated Henry's law Constant of 7.3x 10^-12 Pa m3/mol at 25°C, 101325 Pa indicates very low volatility from surface waters.
Distribution modelling
The following distribution modelling data are available using EPA (EPI Suite 4.1) and EUSES model. (Simple Treat, 2.1.2) partitioning models predict that 84.5% will be degraded, 12.3% will be directed to water, 3.22% to sludge and <<1% to air.
Fugacity modelling with the EPA EPI Suite 4.1 Fugacity model (Level III) predicts 80.8% in soil, 18.8% in water, 0.281% in sediment and 0.115% in air.
Summary of environmental distribution
In accordance with Column 2 of REACH Annex VIII, the screening adsorption study (as required under Section 9.3.1) does not need to be conducted as the substance has been found to be readily biodegradable and has a low log Pow.
EPI suite (KOCWIN v2.00) estimates a KOC value of 365L/kg (MCI method). In Section 4 the solubility is reported as 0.137 g/L and the vapour pressure as 4.5 x 10^-12 Pa at 25 °C. Based on these properties the substance would be expected to be primarily distributed to the water compartment. Using the modelling distribution data in the section above, the partitioning within a sewage treatment plant has been predicted with EUSES Model 2.1.2. Significant partitioning to water is predicted by EUSES while significant partitioning to soil is predicted by the EPISuite fugacity model.
Summary and discussion of bioaccumulation
No experimental data on bioaccumulation are available as the log Kow of -0.607 (Walker & Mullee, 2007) shows a low potential to bioaccumulate.
EPI suite (BCFBAF v3.01) estimates a BCF of 3.162 l/kg wwt (log BCF 0.500 based on regression based method).
Secondary poisoning
Based on the low log Kow -0.607 the substance is expected not to be bioacummulative and hence the possibility of secondary poisoning is low.
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.
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