What is the regulatory status of MSMA?

Regulatory Information


In January 2009, the technical registrants of the organic arsenicals manufacturing-use products reached agreement with the U.S. Environmental Protection Agency (EPA) according to which MSMA has been allowed to be used on cotton, as well as some other use applications, including golf courses, sod farms and highway rights-of-way. The registrants agreed to eliminate and phase out products of disodium methanearsonate (DSMA), calcium acid methanearsonate (CAMA), and cacodylic acid and its sodium salt, and modify certain uses of MSMA, including use on residential lawns, forestry, non-bearing fruit and nut trees, and citrus orchards. That phase out has begun, and no sales or distribution of MSMA for these particular uses is allowed, although use of existing stocks of MSMA is acceptable.


More information can be found on EPA’s website.


Frequently Asked Questions Regarding Changes in EPA Agreement on MSMA - October 2012




Monosodium Salt of  Methanearsonic Acid

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