Registration Dossier
Registration Dossier
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EC number: 203-250-0 | CAS number: 104-90-5
Endpoint summary
Administrative data
Description of key information
Additional information
Two studies were carried out to assess the biodegradation properties of the test item. In a key study ready biodegradation was tested according to OECD Guideline 301 E (Ready biodegradability: Modified OECD Screening Test). The test item was determined ready biodegradable, but failing the 10-day window. In a supporting study according to OECD 302 B (Zahn-Wellens test) the test item showed inherent biodegradation, with 98.7 % degradation in 21 days.
Testing for abiotic degradation was waived, as the substance is readily biodegradable or highly insoluble in water. MEP was shown to be ready biodegradable failing to reach the 10-day window and very soluble (12000 mg/L at 20 °C).
Testing for adsorption/desorption was waived. Instead, the log Koc was calculated using the US EPA EPIWIN (v4.0) software. The resulting log Koc was 2.55 (MCI method) and 2.42 (based on log Kow). The Koc suggests that the chemical is expected to have moderate mobility in soil. The pKa of 6.6 indicates that the chemical exist in the protonated form under acidic conditions. Cations adsorb more strongly to soil surfaces than neutral molecules. If released to water, the substance is not expected to adsorb to suspended matter 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.
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