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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 939-227-3 | CAS number: -
Partition coefficient
Administrative data
Link to relevant study record(s)
Description of key information
Measured values for the test item, Patchouli oil:
Log Pow 3.2 to 5.7 for peaks 1-3 at 35 °C (OECD 117)
Log Pow > 5.7 for peaks 4 to 10 at 35 °C (OECD 117)
Estimated value for patchouli alcohol entered as key value for the purpose of environmental risk assessmment.
Key value for chemical safety assessment
- Log Kow (Log Pow):
- 3.98
Additional information
The HPLC chromatogram of the test material showed a large number of peaks, corresponding to n-octanol/water partition coefficients ranging from 1.8 to more than 5.7. Peaks with a relative peak area of more than 1% were evaluated (10 in total). A significant fraction of the test material was found to have partition coefficients above the highest limit of the calibration range.
Since a significant fraction of Patchouli Oil has partition coefficients > 5.7, the substance is considered to have the potential to bioconcentrate for classification purposes (CLP Regulation EC 1272/2008 cut-off value of ≥ 4) and to meet the screening bioaccumulation criterion (logKow > 4.5) for PBT/vPvB assessment purposes.
For the purpose of the environmental risk assessment, a singe value is required for exposure calculations. Thus the log Kow was estimated for the 3 key constituents using Kowwin v1.68. The values are 3.98 (patchouli alcohol), 6.4 (alpha-bulnesene) and 6.7 (alpha-guaiene).
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.
