TARGET 6 Plus - TenkozMonosodium Methanearsonate (MSMA), an Organic Arsenical, is a PDF.

MSMA is an organic arsenical pesticide that is currently registered for use in the United States.MSMA is used to control grasses and broadleaf weeds.It can only be used on cotton, sod farms, golf courses, and highway rights-of-way in Florida.

MSMA is an organic arsenical, a class of herbicides that also includes DSMA, CAMA and cacodylic acid.The products containing DSMA,CAMA and cacodylic acid were canceled as of September 2009.These chemicals were previously applied to cotton, bearing and non-bearing fruit and nut trees, commercial turf, golf courses, athletic fields, parks and residential lawns.The MSMA canceled uses on athletic fields, parks, residential lawns, non-bearing fruit and nut trees, and citrus orchards in 2009.

MSMA's use on sod farms, golf courses, and highway rights-of-way was to be ended by the EPA in January 2009.The Organic Arsenicals Re registration Eligibility Decision (RED) is an agreement in principle.The peer review by the National Academy of Sciences was included in the January 2009 agreement with EPA.

MSMA can be used on sod farms, golf courses, and highway rights-of-way.The status of these uses and existing stocks provisions are described in the amended cancellation order for organic arsenicals.

MSMA can convert to a more toxic form of arsenic in the soil and can affect drinking water.To prevent exposure to arsenic in drinking water, turf uses of MSMA must be restricted.

The use of MSMA before planting cotton is no longer allowed.MSMA can be used to control weeds.Once plants are growing, this use is limited to two applications per year of two pounds active ingredient per acre.Cotton growers have to maintain a buffer zone around permanent water bodies.

The final phase-out of the remaining MSMA turf uses was provided for in the Agreement in Principle.Congress directed the National Academy of Sciences to evaluate the EPA Integrated Risk Information System (IRIS) risk assessment of the cancer-causing mode of action of arsenic.

The phase-out of the remaining turf uses of MSMA will be put on hold until the EPA responds to the review.The risk assessment process for arsenic is described on the website.

On October 29, 2020, the Arsenical Wood Preservatives Task Force submitted a cancer package for review by the EPA.This submission is being evaluated by the EPA.

MSMA is undergoing registration review, a program that reviews pesticides on a 15-year cycle.Pesticides will not cause adverse effects if they are used according to label directions and precautions, and there is a certainty of no harm if you are exposed to them.The registration review docket EPA-HQ-OPP is located at www.regulations.gov.In particular.

There is a 60-day public comment period on the proposed interim registration review decision for MSMA.Although sod farm, golf course, and highway rights-of-way uses of MSMA do not meet the FIFRA registration standard at this time, due to the ongoing review of the cancer mode of action of inorganic arsenic, it is appropriate to delay.The proposed decision will be considered by the EPA prior to issuing a registration review decision.

It is legal to purchase and use organic arsenical herbicides according to the instructions on the label.According to the label, organic arsenical herbicides do not pose an imminent hazard.The label precautions and directions should always be followed by consumers who choose to use these products.The Organic Arsenicals, Amendments to Terminate Uses, and Amendment to Existing Stocks Provisions clarify the existing stocks provisions for the turf uses and previously canceled uses.