Registration Dossier
Registration Dossier
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EC number: 289-550-2 | CAS number: 89923-62-6
Endpoint summary
Administrative data
Description of key information
Additional information
This particular substance is designed to be used as a dye for diverse textile fabrics. To ensure high performance and quality of the treated fabric, those classes of chemical substances are designed to be not biodegradable by microorganisms. Nevertheless the substance was tested for degradation in several studies.
The Inherent biodegradability assessment was done to measure the biodegradability of the test item. In principle the methods described in OECD Guideline 302B were used. The testing conditions represents a static method to test substances/products for degradation in activated sludge. Analysis is based on the dissolved organic carbon (DOC). FAT 20242/E degraded 28% after 37 days, while FAT 20242/F degraded 53% after 28 days. Hence both can be considered as inherently biodegradable (primary).
An another key study measuring BOD5 is found to be 0 mg O2/g. Since the BOD5 was measured to be zero, no biodegradation is expected to take place.
Several other support studies reported the following results:
BOD5 : 340 mg O2/g.
COD : 1304.3 mg COD/g
COD : 1138 mg /g COD.
COD : 1336.6 mg /g COD.
The above studies reported values >1000 mg/g for COD and BOD5 (key study) value as 0. Relevant is the BOD5/COD quotient which is “zero”, therefore biodegradation is not expected.
Taking into consideration the data from two key studies, the test substance FAT 20242 is considered to be not readily biodegradable.
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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