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7784-46-5

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Basic Information
CAS No.: 7784-46-5
Name: Arsenenous acid, sodiumsalt (1:1)
Molecular Structure:
Molecular Structure of 7784-46-5 (Arsenenous acid, sodiumsalt (1:1))
Formula: AsH O2 . Na
Molecular Weight: 129.91
Synonyms: Arsenenousacid, sodium salt (9CI); Sodium arsenite (NaAsO2) (6CI,7CI); Arsenic sodiumoxide (AsNaO2); Arsenite sodium; Sodium arsenic oxide (NaAsO2); Sodiumarsenite; Sodium metaarsenite
EINECS: 231-148-6
Density: 5.727 g/mL at 25 °C(lit.)
Melting Point: 817 °C(lit.)
Boiling Point: 613 °C(lit.)
Flash Point: N/A
Solubility: Miscible with water. Slightly miscible with alcohol.
Appearance: white granular crystals
Hazard Symbols: Toxic by ingestion and inhalation.
Risk Codes: R23/25; R50/53; R51/53; R45; R52/53; R22
Safety: Confirmed 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 Na2O. See also ARSENIC COMPOUNDS.
Transport Information: N/A
PSA: 40.13000
LogP: -0.50590
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Chemistry

IUPAC Name:  Disodium (2S)-2-aminobutanedioate
Synonyms:  Arsenite de sodium ; Arsenite, sodium ; Sodium arsenite ; Sodium meta-arsenite ; Trinatriumarsenit ; Trisodium arsenite ; Arsenious acid, sodium salt ; Arsenous acid, trisodium salt 
The Molecular Formula of  Sodium arsenite (CAS NO.7784-46-5):AsNaO2
The Molecular Weight of   Sodium arsenite (CAS NO.7784-46-5):129.910170 g/mol
The Molecular Structure of   Sodium arsenite (CAS NO.7784-46-5):
Appearance:off-white to gray
Solubility: H2O: 10%, turbid
Polar Surface Area: 60.69Å
Melting Point: 817 °C(lit.)
Density: 5.727 g/mL at 25 °C(lit.)
Boiling Point: 613 °C(lit.)
Flash Point:
Solubility in water: soluble
Refractive Index (nD):
Appearance:color off-white to gray
Stability: Stable. Incompatible with strong oxidizing agents, strong acids. Protect from moisture. Absorbs carbon dioxide from air. 
Polarizability: 10-24cm3

Uses

  Sodium arsenite ,whose Cas Register Number is 7784-46-5,can be used as enzyme inhibitor.

Toxicity Data With Reference

1.    

dnr-esc 63 µg/well

    ENMUDM    Environmental Mutagenesis. 3 (1981),429.
2.    

mmo-smc 100 mmol/L

    MUREAV    Mutation Research. 117 (1983),149.
3.    

oms-hmn:lym 700 nmol/L

    SWEHDO    Scandinavian Journal of Work, Environment and Health. 7 (1981),277.
4.    

cyt-hmn:lym 1 mg/L

    ENMUDM    Environmental Mutagenesis. 3 (1981),597.
5.    

orl-cld TDLo:1 mg/kg

    CTOXAO    Clinical Toxicology. 10 (1977),477.
6.    

orl-cld LDLo:2 mg/kg

    CTOXAO    Clinical Toxicology. 10 (1977),477.
7.    

orl-rat LD50:41 mg/kg

    AIHAAP    American Industrial Hygiene Association Journal. 30 (1969),470.
8.    

skn-rat LD50:150 mg/kg

    PHJOAV    Pharmaceutical Journal. 185 (1960),361.
9.    

ipr-rat LDLo:7 mg/kg

    JPETAB    Journal of Pharmacology and Experimental Therapeutics. 58 (1936),454.
10.    

ivn-rat LDLo:6 mg/kg

    JPETAB    Journal of Pharmacology and Experimental Therapeutics. 33 (1928),270.
11.    

ipr-mus L

Consensus Reports

IARC Cancer Review: Group 1 IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 7 ,1987,p. 100.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Animal Inadequate Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 23 ,1980,p. 39.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Human Sufficient Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 23 ,1980,p. 39.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Animal No Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 2 ,1973,p. 48.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) . Arsenic and its compounds are on the Community Right-To-Know List. Reported in EPA TSCA Inventory. EPA Genetic Toxicology Program. EPA Extremely Hazardous Substances List.

Safety Profile

Confirmed 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 Na2O. See also ARSENIC COMPOUNDS.
Hazard Codes: ToxicT,DangerousN
Risk Statements: 45-23/25-50/53 
R45:May cause cancer. 
R23/25:Toxic by inhalation and if swallowed. 
R50/53:Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Safety Statements: 53-20/21-28-45-60-61 
S53:Avoid exposure - obtain special instructions before use. 
S20:When using, do not eat or drink. 
S21:When using do not smoke. 
S28:After contact with skin, wash immediately with plenty of soap-suds. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 
S60:This material and its container must be disposed of as hazardous waste. 
S61:Avoid release to the environment. Refer to special instructions / safety data sheets.
RIDADR: UN 2027 6.1/PG 2
WGK Germany: 3
RTECS: CG3675000
HazardClass: 6.1
PackingGroup: II

Standards and Recommendations

OSHA PEL: TWA 0.01 mg(As)/m3; Cancer Hazard
ACGIH TLV: TWA 0.01 mg/m3; Confirmed Human Carcinogen; BEI: 35 µ (As)/L inorganic arsenic and methylated metabolites in urine
NIOSH REL: (Inorganic Arsenic) CL 0.002 mg(As)/m3/15M
DOT Classification:  6.1; Label: Poison, KEEP AWAY FROM FOOD (UN 1686)