Agent Name

Disodium methanearsonate

Alternative Name

DSMA

CAS Number

144-21-8

Formula

C-H5-As-O3.2Na

Major Category

Metals

Synonyms

DMSA; Ansar 184; Ansar 8100; Ansar DSMA Liquid; Arrhenal; Arsinyl; Arsonic acid, methyl-, disodium salt; Arsynal; Cacodyl New; Chipco Crab Kleen; Crab-3-rad 100; Cralo-E-rad; DMA; DMA (VAN); DMA 100; DSMA; DSMA liquid; Dal-E-Rad 100; Di-tac; Diarsen; Dimet; Dinate; Disodium methanarsonate; Disodium methanearsenate; Disodium methyl arsenate; Disodium methyl arsonate; Disodium methylarsenate; Disodium methylarsonate; Disodium monomethylarsonate; Disomear; Drexel DSMA liquid; Jon-trol; MAA sodium salt; Methanearsonic acid, disodium salt; Methar; Methar 30; Metharsan; Metharsinat; Methylarsonat disodny [Czech]; Methylarsonic acid, disodium salt; Namate; Neo-Asycodile; Sodar; Sodium methanearsonate; Sodium metharsonate; Sodium methylarsonate; Somar; Stenosine; Tonarsan; Tonarsin; Versar DSMA LQ; Weed broom; Weed-E-Rad; Weed-E-Rad DMA Powder; Weed-E-Rad 360; Weed-hoe; [ChemIDplus]

Category

Arsenic Compounds, Organic

Description

Colorless hygroscopic solid; [Hawley]

Sources/Uses

Used as herbicide for control of grass weeds in turf, cotton, and non-crop areas; Also used in pharmaceuticals; [HSDB]

Comments

A mild skin and eye irritant; [HSDB] May cause irritation; [MSDSonline] Most excreted unchanged; [Rosenstock, p. 947] For MSMA and DSMA, developmental studies of rats and rabbits along with a two-generation reproductive study show no indication of increased susceptibility; No evidence of carcinogenicity; Target organs are large intestines and kidneys; [Reference #1]

Reference Link

EPA Pesticide Chemical Search

Exposure Assessment
PEL (OSHA)

0.5 mg/m3, as As

Vapor Pressure

1.0E-7 mm Hg

Lethal Concentration

LC50 (rat) > 6,000 mg/m3

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

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Chemical Information

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Biomedical References

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Related Information in HazMap
Processes

Industrial Processes with risk of exposure: