Registration Dossier
Registration Dossier
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EC number: 286-386-3 | CAS number: 85223-31-0
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
Low potential for adsorption.
Key value for chemical safety assessment
- Koc at 20 °C:
- 35
Additional information
Acid Blue 134 is expected to have a low potential for absorption, on the basis of the partition coefficient; the log Pow was determined to be < -2, at 21.0 °C and pH 4.50 - 5.30.
However, the available data on the structural analogous Similar Substance 02 is considered (details on read-across approach are given in the IUCLID section 13).
The estimation of the adsorption coefficient (Koc) of Similar Substance 02 was carried out using high performance liquid chromatography (HPLC), according to the OECD Guideline 121. Calibration was performed using six reference items with known values of log Koc and the capacity factor k' was calculated from the dead time of the HPLC-system for each reference item. The estimated range of log Koc for the test item was 1.54 -1.78 (SD = 0.006), which corresponds to a Koc range of 35 - 60.
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