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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 266-719-9 | CAS number: 67564-91-4
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
Fenpropimorph can be classified as non-mobile in soil. In all soils investigated, the Koc values were > 2772 ml/g, with a mean of 4382 ml/g at an average temperature of 22°C.
Key value for chemical safety assessment
- Koc at 20 °C:
- 4 382
Additional information
Table 1: Adsorption and desorption of fenpropimorph in different soils
soil | textural class | adsorption | adsorption | adsorption | desorption | |
designation |
| KA [ml/g] | 1/n | KOC [ml/g] | H2O | CaSO4 |
Pfungstadt | loam | 34.47 | 1.340 | 5943 | 55.95 | 48.33 |
Neuhofen | loamy sand | 73.73 | 0.867 | 2772 | 97.28 | 74.91 |
LUFA | sand | 22.60 | 0.949 | 4432 | 24.15 | 15.17 |
Another additional study about the strong adsorption of fenpropimorph to soil was published results from Stockmaier et al. (1996/10365) with 2 soils and is summarized below. The KD values were determined within that publication and were calculated here to KOC with the reported organic carbon contents of the soils, compare Table 2.
Table 2: Adsorption and desorption of fenpropimorph in 2 German soils.
soil designation | textural class (German scheme) | organic carbon (%) | pH (CaCl2) | KD [ml/g] | KOC [ml/g] |
Nienwohlde | silty sand | 1.2 | 6.3 | 46 | 3833 |
Neuenkirchen | clayey silt | 0.9 | 7.3 | 79 | 8778 |
Other additional studies on metabolites are existing and are summarized in the following.
Considering the results of the new metabolism data on fenpropimorph (2004/1022507) and the formation of metabolite fenpropimorph-acid, an adsorption/desorption study on fenpropimorph-acid was conducted and measured adsorption parameters are given in table 3.
Soil metabolite fenpropimorph-acid is expected to be less mobile in acidic soil (pH < 6, Koc 75) compared to alkaline soil (pH >7, Koc 19-32).
Table 3: Adsorption parameters for fenpropimorph-acid
Soil | Soil type | pH | KF | 1/n | KFOC | Kd | Koc |
Lufa 2.2 | Loamy sand | 5.6 | 1.45 | 0.882 | 68.6 | 1.59 | 74.8 |
Birnbaum | Loamy sand | 6.1 | 0.443 | 0.955 | 55.4 | 0.453 | 56.6 |
Sora | Silt loam | 6.4 | 0.883 | 0.890 | 46.2 | 0.952 | 49.8 |
Bruch West | Sandy loam | 7.4 | 0.403 | 0.851 | 17.5 | 0.441 | 19.2 |
Lufa 3A | Loam | 7.5 | 0.833 | 0.835 | 29.9 | 0.895 | 32.1 |
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.
