Registration Dossier
Registration Dossier
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Reaction mass of tetrasodium 3-[[4-[[4-[(6-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-6-sulphonato-1-naphthyl]azo]-1-naphthyl]azo]naphthalene-1,5-disulphonate and tetrasodium 3-[[4-[[4-[(6-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-7-sulphonato-1-naphthyl]azo]-1-naphthyl]azo]naphthalene-1,5-disulphonate
EC number: 911-640-3 | CAS number: -
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
Kow method:
Koc: 4.21 l/kg
logKoc: 0.6
Key value for chemical safety assessment
- Koc at 20 °C:
- 4.21
Additional information
Koc of test item neutral form was calculated using EpiSuite 4.1., the suite of physical/chemical property and environmental fate estimation programs developed by the EPA’s Office of Pollution Prevention Toxics and Syracuse Research Corporation (SRC).
Direct Blue 71 is expected to be a substance with a low potential for adsorption, as confirmed by the partition coefficient log Kow of -3.2 (R&C, 2012).
Based on REACH regulation annex VIII column 2 (specific rules for adaptation from column 1) the study need not be conducted based on the physicochemical properties the substance can be expected to have a low potential for adsorption (e.g. the substance has a low octanol water partition coefficient).
[LogKoc: 0.6]
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