Registration Dossier
Registration Dossier
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EC number: 220-027-3 | CAS number: 2610-10-8
Endpoint summary
Administrative data
Description of key information
Additional information
For some of the data points a read-across is proposed with different similar substances.
In the aquatic environment hydrolysis is not expected to be an important elimination process for DR80, based on data on similar substance which undergoes slow hydrolysis, with a calculated half-life greater than one year at 25 °C and pH values of 4, 7 and 9, based on measured hydrolysis rates at 50°C when after 2.4 hours only around 1% of the sample was hydrolysed at pH 4, 7 and 9 (BASF, 1992).
Phototransformation in air/water/soil has not been investigated because direct and indirect exposure to sunlight is unlikely based on release considerations reported above, the CSR and proposed risk management measures.
Furthermore, phototransformation is not considered a relevant process for the substance, although phototransformation can be enhanced using oxidants.
DR80 is expected to be a substance with a low potential for adsorption based on the partition coefficient Kow of -2.8197.
Under standard test conditions no ready biodegradation was observed both for Direct Red 80 and for similar substance.
BCF has not been tested because DR80 has a low estimated potential for bioaccumulation and/or a low potential to cross biological membranes; the estimated value of DR80 was 56.23 L/kg wet-wt, calculated using the software EpiSuite 4.1.
The organic carbon partition coefficient of -2.8197 reported in section 4.7 Partition Coefficient end point confirms this provisional consideration, leading to the conclusion that DR80 is not expected to be bioaccumulable.
Direct and indirect exposure of sediment and soil is unlikely, since environmental exposure only occurs through industrial waste water; based on the CSR and risk management measures reported there is no sediment and/or soil exposure expected.
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