Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 252-021-1 | CAS number: 34432-92-3
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
On the basis of study results the substance is immobile in soil and sludge.
Key value for chemical safety assessment
- Koc at 20 °C:
- 44 771
Additional information
The adsorption coefficient of test substance, Solvent Yellow 124, on soil and on sewage sludge was estimated. The HPLC method with reference compounds was used.
The test was performed according to the Method C.19, Estimation of the adsorption coefficient (KOC) on soil and sewage sludge using high performance liquid chromatography (HPLC), Council Regulation (EC) No 440/2008, Published in O.J.L 142, 2008.
Estimation of the adsorption coefficient (KOC) on soil and sewage sludge at given pH of mobile phase and set temperature:
log = 4.651 ± 1.168 (pH = 6.5, 25°C)
log > 5 (5.510 ± 1.591) (pH = 6.5, 25°C)
The test substance was more retained on the column than any of reference standard. The results were obtained by extrapolation of the given calibration curve.
Since the value of log falls out of the recommended determinable range (1.5 to 5.0), which is listed in above quoted method C.19, the result for sewage sludge is considered less reliable.
Value of log obtained by extrapolation of the calibration curve partially falls of the recommended determinable range.
Other adsorption coefficient indicated as dimensionless:
- other: Koc(soil) ,4.651 at the temperature 25.0°C
- other: Koc(sludge) ,5.51 at the temperature 25.0°C
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
