Registration Dossier
Registration Dossier
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EC number: 274-490-1 | CAS number: 70236-60-1
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
Koc: 9.57
Key value for chemical safety assessment
- Koc at 20 °C:
- 9.57
Additional information
According to the REACH Regulation, Annex VIII, Column 2, the study does not need to be conducted if 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). Acid Brown 282 is expected to have a low potential for absorption, on the basis of the partition coefficient that was determined by means of shake flask method (according to the OECD 107) and that was calculated as average of Pow; the resulted value is 0.8654 (average log Pow: -0.0752) (REACH&Colours Kft, 2012).
Nevertheless, the log Koc and the partition coefficients necessary for the PNECs calculation (PNEC sediment freshwater, PNEC sediment marine and PNEC soil) were estimated using the EUSES 2.1.2 tool*.
* European Union System for the Evaluation of Substances (EUSES) version 2.1
Other adsorption coefficient indicated as dimensionless:
- log Kp (suspended matter-water) ,1.14
- log Kp (soil-water) ,0.487
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