Sodium m-arsenite

Sodium m-arsenite Basic information
Product Name:Sodium m-arsenite
Synonyms:Arsenenousacid,sodiumsalt;arseniousacid,monosodiumsalt;arsenitedesodium;prodalumnoldouble;ratdeathliquid;sodanit;sodiumarsenite,aqueoussolution;sodiumarsenite,solid
CAS:7784-46-5
MF:AsO2.Na
MW:129.91
EINECS:232-070-5
Product Categories:ArsenicVolumetric Solutions;Catalysis and Inorganic Chemistry;Inorganics;Chemical Synthesis;S - Z;Salt Solutions
Mol File:7784-46-5.mol
Sodium m-arsenite Structure
Sodium m-arsenite Chemical Properties
Melting point 817 °C(lit.)
Boiling point 613 °C(lit.)
density 5.727 g/mL at 25 °C(lit.)
storage temp. Store at +15°C to +25°C.
solubility H2O: soluble
form powder
color off-white to gray
PH9.3 (H2O, 20°C)
Water Solubility Miscible with water. Slightly miscible with alcohol.
Merck 13,8651
Stability:Stable. Incompatible with strong oxidizing agents, strong acids. Protect from moisture. Absorbs carbon dioxide from air.
EPA Substance Registry SystemSodium arsenite (7784-46-5)
Safety Information
Hazard Codes T,N
Risk Statements 23/25-50/53-51/53-45-52/53-22-23/24/25-21-34
Safety Statements 20/21-28-45-60-61-53-36/37-36/37/39-26
RIDADR UN 1558 6.1/PG 2
WGK Germany 3
RTECS CG0525000
10
TSCA Yes
HS Code 2842 90 80
HazardClass 8
PackingGroup III
Hazardous Substances Data7784-46-5(Hazardous Substances Data)
ToxicityLD50 orally in rats: 0.041 g/kg (Smyth)
MSDS Information
ProviderLanguage
ACROS English
SigmaAldrich English
ALFA English
Sodium m-arsenite Usage And Synthesis
Chemical Propertieswhite granular crystals
Chemical PropertiesSodium arsenite is a white or grayish-white powder or flakes.
UsesTechnical grade in manufacture of arsenical soap for use on skins, for treating vines against certain scale diseases; as insecticide especially for termites.
UsesSodium arsenite is used as hide preservative, antiseptic, dyeing and soaps. It is used as a stressor to induce production of heat shock proteins.
DefinitionChEBI: An inoganic sodium salt with formula with formula NaAsO2.
General DescriptionA white or grayish-white powder. Denser than water. Contact may irritate skin, eyes and mucous membranes. May be toxic by ingestion, inhalation and skin absorption.
Air & Water ReactionsSoluble in water. Slowly converted in solution to arsenates by atmospheric oxygen; in dry state Sodium m-arsenite is decomposed by carbon dioxide. [EPA, 1998].
Reactivity ProfileSalts, basic, such as SODIUM ARSENITE, are generally soluble in water. The resulting solutions contain moderate concentrations of hydroxide ions and have pH's greater than 7.0. They react as bases to neutralize acids. These neutralizations generate heat, but less or far less than is generated by neutralization of the bases in reactivity group 10 (Bases) and the neutralization of amines. They usually do not react as either oxidizing agents or reducing agents but such behavior is not impossible.
HazardToxic by ingestion and inhalation.
Health HazardExtremely toxic: probable oral lethal dose (human) 5-50 mg/kg, between 7 drops and one teaspoon for 70 kg person (150 lb.). Poisonous if swallowed or inhaled. Human suspected carcinogen.
Fire HazardSodium m-arsenite may burn but does not ignite readily. When heated Sodium m-arsenite emits toxic fumes of arsenic and sodium oxide. Slowly converted in solution to arsenates by atmospheric oxygen; in dry state Sodium m-arsenite is decomposed by carbon dioxide.
Safety ProfileConfirmed human carcinogen. Human poison by ingestion. Experimental poison by ingestion, skin contact, intravenous, intramuscular, and intraperitoneal routes. An experimental teratogen. Experimental reproductive effects. Human mutation data reported. Used as an herbicide and pesticide. When heated to decomposition it emits toxic fumes of arsenic and NazO. See also ARSENIC COMPOUNDS.
Potential ExposureThis material is used in manufacturing of arsenical soap for use on skin; treating vines against certain scale diseases; wood preservation; as a reagent in preparation of Methylene iodide; corrosion inhibitor; and for herbicidal and pesticidal purposes
ShippingUN2027 Sodium arsenite, solid, Hazard Class: 6.1; Labels: 6.1-Poisonous materials. UN1686 Sodium arsenite, aqueous solutions, Hazard Class: 6.1; Labels: 6.1-Poisonous materials.
IncompatibilitiesChemically active metals. Arsine, a very deadly gas, can be released in the presence of acid, acid mists, or hydrogen gas.
Waste DisposalThe arsenic may be precipitated as calcium arsenite. It should be stored until recycled. In accordance with 40CFR165, follow recommendations for the disposal of pesticides and pesticide containers. Must be disposed properly by following package label directions or by contacting your local or federal environmental control agency, or by contacting your regional EPA office.
Sodium m-arsenite Preparation Products And Raw materials
TRISODIUMARSENATEHEPTAHYDRATE SODIUM P-ARSENO-N-PHENYL- GLYCINAMIDE Arsenic Sodium 4-Aminophenylarsonate SODIUM ARSENATE, HEPTAHYDRATE sodium arsenate ARSENAZO I Sodium pyroarsenate MONOSODIUM ACID METHANE ARSONATE SESQUIHYDRATE Sodium m-arsenite Sodium methylarsonate Sodium arsenate monobasic Disodium methylarsonate SODIUM ARSENITE SODIUM ARSENATE Sodium cacodylate 97+ trisodium arsenate tryparsamide

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