IUPAC Name: 2-(4-chloro-2-methylphenoxy)acetic acid
MCL: 0.03 ppm
Source: Used as an herbicide to control weeds and wild grass.
Summary: MCPA is a member of the chlorobenzenes and is a phenoxy herbicide. It is soluble in water up to 630 mg/L at 25 C and has a density of 1.56 g/mL. Upon decomposition it produces gaseous hydrogen chloride and nitrogen oxides. It has an acid dissociation constant of pKa = 3.13. Improper disposal or use may create environmental contamination. MCPA will be very mobile in soil as it has a Koc value ranging from 50-62. Photolysis and biodegradation are the most likely causes of natural removal in water and soil.
GHS Hazard Statement: H302, H312, H315, H316, H318, H320, H330, H332, H361, H371, H400, H410, GHS05, GHS06, GHS07, GHS08, GHS09