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Monosodium methyl arsenate (MSMA) is an arsenic-based herbicide. It is an organo-arsenate; less toxic than the inorganic form of arsenates. However, the EPA states that all forms of arsenic are a serious risk to human health and the United States' Agency for Toxic Substances and Disease Registry ranked arsenic as number 1 in its 2001 ...
- MSMA
- 161.95 g/mol
- CH₄AsNaO₃
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- Background - Organic Arsenical Pesticides
- Uses of MSMA
- Scientific Peer Review
- Registration Review
- For More Information
MSMA is an organic arsenical, a class of herbicides that also includes DSMA, CAMA, cacodylic acid and its sodium salt. As of September 2009, all remaining products containing DSMA, CAMA, cacodylic acid and its sodium salt were canceled. These chemicals were previously registered for use on cotton, bearing and non-bearing fruit and nut trees, commer...
Turf Uses
In January 2009, EPA reached an Agreement in Principle with registrants of MSMA to end its use on sod farms, golf courses, and highway rights-of-way after December 31, 2013. Read the Agreement in Principle to Implement the Organic Arsenicals Reregistration Eligibility Decision (RED). In September 2012, EPA modified the January 2009 Agreement in Principle with registrants to include a peer review by the National Academy of Sciences(NAS) of the carcinogenic mode of action (MOA) of inorganic ars...
Cotton
As of May 26, 2009, the use of MSMA to clear weeds in fields prior to planting cotton was no longer permitted on labels. MSMA can still be used to control weeds in cotton fields. This use is limited to two applications per season of two pounds active ingredient per acre for each application, once plants are growing (also called post-emergent application). Cotton growers also must maintain a 50-foot buffer zone around permanent water bodies.
The 2009 Agreement in Principle provided for a scientific peer review of the carcinogenic mode of action (MOA) of inorganic arsenic before the final phase-out of the remaining MSMA turf uses. Because of aDecember 2011 Congressional directiveto the National Academy of Sciences (NAS) to evaluate the EPA Integrated Risk Information System (IRIS) risk ...
Currently, MSMA is undergoing registration review, a program that re-evaluates all pesticides on a 15-year cycle. Registration review ensures pesticides will not cause unreasonable adverse effects when used according to label directions and precautions and there is a reasonable certainty of no harm from dietary and residential exposure. All documen...
Monosodium Methanearsonate (MSMA), an Organic Arsenical. Monosodium methanearsonate (MSMA) is an organic arsenical pesticide currently registered for use in the United States. MSMA is a broad spectrum herbicide used to control grasses and broadleaf weeds.
17 ago 2023 · L’idea generale della MSMA è quella di una riduzione di cilindrata: si tornerebbe sotto il litro. Esattamente ottocentocinquata centimetri cubici. Cinquanta cubici in più dell’era delle 800 ...
1 ott 2016 · Monosodium methyl arsenate (MSMA) is an efficacious postemergence herbicide commonly used in cotton ( Gossypium hirsutum L.) and turfgrass systems. Concerns have arisen about potential adverse effects of MSMA-derived arsenic on human and environmental health. The USEPA enacted a phase-out of MSMA and other organic arsenical ...
7 mag 2018 · L'Assemblea Generale dei soci della MSMA, tenutasi a Jerez de la Frontera in occasione del GP di Spagna, ha eletto Claudio Domenicali (Amministratore Delegato di Ducati Motor Holding SpA) nuovo Presidente dell’Associazione, affidandogli l’incarico per i prossimi due anni. Una Casa italiana al vertice dell’Associazione dei ...
L’Associazione dei costruttori del Motomondiale (MSMA) si è riunita a Tokyo, in Giappone, per discutere del prossimo campionato. Dalla tavola rotonda è emersa una prima proposta per contenere ...
