MSMA Herbicide and Arsenic Name: Larry D. S. Date: Thursday,
April 18, 2002 8:31:44 PM The question relates to the potential
release of arsenic from the herbicides MSMA
(monosodiummethanearsonate) and cacodylic acid (dimethylarsinic
acid)after they are sprayed on soils. Both compounds are tightly
bound to soils, especially those with high clay content.
However, they are not substantially metabolized in the soil
environment in the absence of microorganisms. Is the release of
arsenic inhibited by the bond strength of the arsenic to the
methyl groups in the molecules? How do these strengths compare
to common compounds such as water, H2O? The following indicates
that arsenic in herbicides has been known to cause Anthony R.
Brach, Ph.D. Click here to return to the Botany Archives Update:
June 2012