Registration Dossier
Registration Dossier
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EC number: 266-358-7 | CAS number: 66423-13-0
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
Determined in 3 sandy soils the Koc of Mecoprop-P acid (MCPP-P acid), the hydrolysis product of Mecoprop-P n-octyl ester, was in the range of 135 - 167. The lowest Koc of 135 is used for further assessment as a worst case assumption. Mecoprop-P acid (MCPP-P acid) has a low sorption potential to soil and sediment, and a moderate migration potential to groundwater.
Key value for chemical safety assessment
- Koc at 20 °C:
- 135
Additional information
The adsorption coefficient of Mecoprop-P n-octyl ester was measured using the HPLC method (log Koc 5.3 at 25°C).
However, Mecoprop-P n-octyl ester hydrolyses rapidly in natural water. Therefore, the hydrolysis product Mecoprop-P acid (MCPP-P acid) was used for further risk assessment of Mecoprop-P n-octyl ester in the environment.
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