Registration Dossier

Diss Factsheets

Environmental fate & pathways

Henry's Law constant

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

Directly calculated as a ratio of the vapor pressure to the water solubility the Henry’s law constant (HLC) of Mecoprop-P acid (MCPP-P acid), the hydrolysis product of Mecoprop-P n-octyl ester, is 5.74E-05 Pa m3/mol. Therefore, Mecoprop-P acid (MCPP-P acid) is considered nonvolatile from the aqueous phase.

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
0
at the temperature of:
20 °C

Additional information

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.