| 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); |
| Chemical Properties | White solid. Very solu-
ble in water.
|
| Uses | 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. |
