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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 948-231-4 | CAS number: -
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
Partition coefficients
For metals, the transport and distribution over the different environmental compartments e.g. the water (dissolved fraction, fraction bound to suspended matter), soil (fraction bound or complexed to the soil particles, fraction in the soil pore water,...) is described and quantified by the partition coefficients (Kd values) between these different fractions.
For Germanium, Kd's between sediment and freshwater were determined for regional freshwater and estuarine waters. The Kd values are:
-for freshwater: >9796 L/kg (based on 90P values) and > 13810 L/kg (based on 50P values) for Ge in sediment and freshwater.
-for estuarine waters: 452 L/kg based on 90P values also.
the Log Kd for freshwater - sediment is also considered relevant for the sludges and the suspended matter.
For soil, a realistic Kd value of 1000kg/l was derived from the literature (Sheppard et al 2009).
Key value for chemical safety assessment
Other adsorption coefficients
- Type:
- log Kp (solids-water in effluent sewage sludge)
- Value in L/kg:
- 4.14
- at the temperature of:
- 20 °C
Other adsorption coefficients
- Type:
- log Kp (solids-water in activated sewage sludge)
- Value in L/kg:
- 4.14
- at the temperature of:
- 20 °C
Other adsorption coefficients
- Type:
- log Kp (solids-water in settled sewage sludge)
- Value in L/kg:
- 4.14
- at the temperature of:
- 20 °C
Other adsorption coefficients
- Type:
- log Kp (solids-water in raw sewage sludge)
- Value in L/kg:
- 4.14
- at the temperature of:
- 20 °C
Other adsorption coefficients
- Type:
- log Kp (solids-water in suspended matter)
- Value in L/kg:
- 4.14
- at the temperature of:
- 20 °C
Other adsorption coefficients
- Type:
- log Kp (solids-water in sediment)
- Value in L/kg:
- 4.14
- at the temperature of:
- 20 °C
Other adsorption coefficients
- Type:
- log Kp (solids-water in soil)
- Value in L/kg:
- 3
- at the temperature of:
- 20 °C
Additional information
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.
