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HomeProduct name listSodium methylarsonate

Sodium methylarsonate

  • CAS NO.:2163-80-6
  • Empirical Formula: CH4AsO3.Na
  • Molecular Weight: 161.95
  • MDL number: MFCD00072437
  • EINECS: 218-495-9
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2023-04-23 13:52:06
Sodium methylarsonate Structural

What is Sodium methylarsonate?

Chemical properties

White solid. Very solu- ble in water.

Chemical properties

Colorless solid or colorless to red or green solution. Odorless. Specific Gravity: (DSMA) 1.0 @ 20C; (MSMA solutions) 1.4°1.6 @ 20°C (liquid);

The Uses of Sodium methylarsonate

Postemergence herbicide for grassy weeds.

Definition

The monosodiumsalt of methylarsonic acid.

General Description

Odorless colorless solid. Solution may be red or green. Solid may float or sink in water; solid and solution mix with water.

Air & Water Reactions

Water soluble.

Reactivity Profile

Sodium methylarsonate is decomposed by strong oxidizers and reducers.

Hazard

Toxic; poison.

Health Hazard

Subacute poisoning by arsenicals causes salty taste, burning in throat and stomach, and intestinal pain. Acute toxicity indicated by headache, vomiting, stupor, convulsions, paralysis. About 1 ounce to 1 pound must be taken to cause these symptoms.

Fire Hazard

Special Hazards of Combustion Products: Toxic gases may be generated in fires.

Trade name

WEED-BROOM® (DSMA+Bomacil+2,4-D); WEEDE-RAD®; WEED-S-RAD®; WEED HOE®

Safety Profile

Poison by unspecified route. Moderately toxic by ingestion. A skin and eye irritant. When heated to decomposition it emits toxic fumes of As and Na2O.

Potential Exposure

Those exposed to this organometallic, selective pesticide used for postemergence control of grasses, sedges, and weeds.

Shipping

UN2994 Arsenical pesticides, liquid, toxic, Hazard Class: 6.1; Labels: 6.1-Poisonous materials. UN3280 Organoarsenic compound, liquid, n.o.s., Hazard Class: 6.1; Labels: 6.1-Poisonous materials, Technical Name Required, Potential Inhalation Hazard (Special Provision 5).

Incompatibilities

Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides. Incompatible with reducing agents

Waste Disposal

Disposal of unused product must be undertaken by qualified personnel who are knowledgeable in all applicable regulations and follow all pertinent safety precautions including the use of appropriate protective equipment. For proper handling and disposal, always comply with federal, state, and local regulations.

Properties of Sodium methylarsonate

Melting point: 113-116°C
Density  1.50
form  solid
Water Solubility  >=10 g/100 mL at 22 ºC
EPA Substance Registry System Monosodium methanearsonate (2163-80-6)

Safety information for Sodium methylarsonate

Signal word Danger
Pictogram(s)
ghs
Skull and Crossbones
Acute Toxicity
GHS06
ghs
Environment
GHS09
GHS Hazard Statements H410:Hazardous to the aquatic environment, long-term hazard
Precautionary Statement Codes P261:Avoid breathing dust/fume/gas/mist/vapours/spray.
P403+P233:Store in a well-ventilated place. Keep container tightly closed.

Computed Descriptors for Sodium methylarsonate

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