Registration Dossier
Registration Dossier
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EC number: 630-324-3 | CAS number: 861229-15-4
Endpoint summary
Administrative data
Description of key information
Biodegradation in water:
For MCPP-P acid the 28-day degradation was 85 % and for the positive control (with reference substance benzoic acid, sodium salt) the biodegradation was 87 % after 14 days. In conclusion, MCPP-P acid is considered to be "Readily Biodegradable". MCPP-P 2-EHE hydrolyses to MCPP-P acid, the acid is used as a relevant point to assess the biodegradation of MCPP-P 2-EHE in water. Therefore, MCPP-P 2-EHE is considered to be readily biodegradable.
MCPP-P is readily degraded in the aerobic aquatic systems and is therefore unlikely to persist in the aquatic environment. Half-life in water of 24 hours and half-life in sediment/water system of 23 hours were determined.
Biodegradation in sediment:
The study on sediment screening does not need to be conducted becasue direct and indirect exposure of the sediment is unlikely.
Biodegradation in soil:
The rate of degradation of MCPP-P 2-EHE applied as a commercial formulation also containing ioxynil octanoate to sandy loam soil under aerobic conditions at 5 °C was studied over 56 days. The half-life of MCPP-P 2-EHE was calculated at 8.3 days. The major degradation product over the period of the study was MCPP-P acid.
Additional information
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