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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 251-073-2 | CAS number: 32509-66-3
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
The adsorption coefficient (KOC) on soil and on sewage sludge using high performance liquid chromatography (HPLC) was estimated according to OECD/OCDE 121 (2001) and Council Regulation (EC) No. 440/2008, Method C.19 for the test item Hostanox O 3 Pills.
The test was performed temperature controlled (20 °C) with a mobile phase of 75 % acetonitrile and 25 % citrate buffer. A 10 mg/L sample of the test itemHostanox O 3 Pillswas analyzed threefold via HPLC on a cyanopropyl (CN-) column with PDA‑detection. Calibration was performed using six reference items for soil and six for sewage sludge with known values of log KOC, each with a nominal concentration of 2 mg/L. Analysis of the reference items were performed once before and after analysis of test item, respectively. Dead time of the HPLC-system was determined threefold using 2 mg/L sodium nitrate.
Under test conditions the retention time of the test item Hostanox O 3 Pills was found to be 3.308 minutes
Under test conditions the retention time of the test item Hostanox O 3 Pills was found to be 3.3 ± 0.0004 minutes at pH 5.6–6.1. Based on the corresponding log k’ value for the test item the log Koc values for soil and sewage sludge was:
log KOC, soil :3.951
log KOC, sewage sludge: 3.969
Key value for chemical safety assessment
- Koc at 20 °C:
- 8 940
Additional information
[LogKoc: 3.951]
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.
