Registration Dossier
Registration Dossier
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EC number: 915-761-2 | CAS number: -
Endpoint summary
Administrative data
Description of key information
Basic Red 046 Methyl Sulfate was found to be hydrolytically stable as well as not readily biodegradable.
Additional information
By the nature of their design and use, dyes are not intended to be readily biodegradable as this would assist in the rapid destruction of the dyestuff, rendering it unfit for purpose. As such, it is accepted that such substances are not readily biodegradable under relevant environmental conditions. A published study (Pagga & Brown, 1986) describes the results of the testing of 87 dyestuffs in short-term aerobic biodegradation tests. The authors of this publication concluded that dyestuffs are very unlikely to show any significant biodegradation in such tests. However, Basic Red 046 Methyl Sulfate was tested for hydrolytic stability, biodegradability and its adsorption coefficient, summary of the results obtained from these studies is presented below:
FAT 31016/T TE was found to be hydrolytically stable, with half life of >1 year at 25 °C.
BOD5/COD ratio for FAT 31016/F was calculated to be 210/593.2 = 0.35. The obtained BOD5/COD ratio is <0.5, hence FAT 31016/F is considered to be not readily biodegradable.
Basic Red 046 Methyl Sulfate is a salt, hence determination of adsorption coefficient using HPLC method was considered not feasible. Hence, the adsorption coefficients for the substance (FAT 31016/T TE) was estimated using KOCWIN and following values were obtained.
Log Koc from predicted Kow values = 2.60 L/kg and 14.5 L/kg (constituents 1 and 2 respectively)
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