Registration Dossier
Registration Dossier
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EC number: 940-422-0 | CAS number: -
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
Adsorption/Desorption
Based on the measured partitioning data of the read across substance Glucamide 18,18u it can be concluded that the partitioning of the registration substance to solid phases like soil, sediment and sludge is non-linear with respect to test item concentration and not directly correlated to organic carbon content. Sorption is influenced by ionic interactions between the hydrogen of the hydroxyl groups of the glucamine part of the molecule. Based on this fact it makes not much sense to characterize the sorption by the Koc. Instead Kd values for the different sorbents should be used.In the following the Kd values from the read across substance Glucamide 18,18u is given.
Sorption of 14C Glucamide 12 to raw and activated sludge
The adsorption coefficients (Kd) of C12 Glucose amide on activated sludge (AS) and deactivated raw sewage (RS) using both the wet and dry conditions were 261 ± 20 (wet), 264 ± 24 (dry), 892 ± 55 (wet) and 1802 ± 272 respectively.
Key value for chemical safety assessment
Other adsorption coefficients
- Type:
- other: Kd soil LUFA 2.2.(median)
- Value in L/kg:
- 541
- at the temperature of:
- 20 °C
Other adsorption coefficients
- Type:
- other: Kd soil LUFA 2.3 (median)
- Value in L/kg:
- 611
- at the temperature of:
- 20 °C
Other adsorption coefficients
- Type:
- other: Kd soil LUFA 2.4 (median)
- Value in L/kg:
- 1 280
- at the temperature of:
- 20 °C
Other adsorption coefficients
- Type:
- other: Kd sediment Rössingbach
- Value in L/kg:
- 7 375
- at the temperature of:
- 20 °C
Other adsorption coefficients
- Type:
- other: Kd primary sludge STP Hildesheim (median)
- Value in L/kg:
- 173
- at the temperature of:
- 20 °C
Other adsorption coefficients
- Type:
- other: Kd activated sludge STP Hildesheim (median)
- Value in L/kg:
- 488
- at the temperature of:
- 20 °C
Additional information
OECD 106 Adsorption/Desorption study with 14C Glucamide 18u
The median values of the Kd values from the OECD 106 study of 14C Glucamide 18u were used for the environmental exposure calculations of the registration substance.
Sorption of 14C Glucamide 12 to raw and activated sludge
The adsorption coefficients (Kd) of C12 Glucose amide on activated sludge (AS) and deactivated raw sewage (RS) using both the wet and dry conditions were 261 ± 20 (wet), 264 ± 24 (dry), 892 ± 55 (wet) and 1802 ± 272 respectively.
The adsorption ofC12 Glucose amide (C12 GA)onto deactivated raw sewage (RS) and activated sludge (AS) solids was determined at realistic test substance concentrations.
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