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SODIUM ARSENITE
ICSC: 1603
Peer-Review Status: 20.10.2005 Validated
Arsenious acid, sodium salt
Sodium meta-arsenite
Sodium dioxoarsenate 
CAS #: 7784-46-5 RTECS #: CG3675000
UN #: 2027
EC #: 033-002-00-5
EINECS #: 232-070-5
    Formula: NaAsO2
Molecular mass: 129.9

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.    In case of fire in the surroundings, use appropriate extinguishing media. 
EXPLOSION      
 
EXPOSURE   PREVENT DISPERSION OF DUST! AVOID ALL CONTACT! AVOID EXPOSURE OF (PREGNANT) WOMEN!  IN ALL CASES CONSULT A DOCTOR! 
Inhalation Cough. Headache. Laboured breathing. Sore throat. See Ingestion.  Use closed system or ventilation.  Fresh air, rest. Refer for medical attention. 
Skin MAY BE ABSORBED! Redness. Pain.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention . 
Eyes Redness. Pain.  Wear face shield or eye protection in combination with breathing protection.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Abdominal pain. Burning sensation in the throat and chest. Vomiting. Diarrhoea. Dizziness. Headache. Shock or collapse.  Do not eat, drink, or smoke during work. Wash hands before eating.  Rinse mouth. Give a slurry of activated charcoal in water to drink. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention . 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: chemical protection suit including self-contained breathing apparatus. Do NOT let this chemical enter the environment. Vacuum spilled material with specialist equipment. Sweep spilled substance into covered sealable, plastic containers. Carefully collect remainder. Then store and dispose of according to local regulations.  Unbreakable packaging.
Put breakable packaging into closed unbreakable container.
Do not transport with food and feedstuffs. 
EC Classification
Symbol: T, N; R: 23/25-50/53; S: (1/2)-20/21-28-45-60-61; Note: A, 1 
UN Classification
UN Hazard Class: 6.1; UN Pack Group: II 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-61GT5-II.  Store in an area without drain or sewer access. Well closed. Dry. Separated from acids, strong oxidants and food and feedstuffs. 

IMPORTANT DATA
Physical State; Appearance
WHITE OR GREY HYGROSCOPIC POWDER. 

Physical dangers
 

Chemical dangers
Upon heating, toxic fumes are formed. Decomposes on heating. This produces toxic fumes. Reacts with acids and strong oxidants. This produces toxic arsine gas (see ICSC 0222). Attacks many metals. This produces flammable/explosive gas (hydrogen - see ICSC 0001) and arsine. 

Occupational exposure limits
TLV (as As): 0.01mg/m³ as TWA; A1 (confirmed human carcinogen); BEI issued; (ACGIH 2005). 

Routes of exposure
The substance can be absorbed into the body by inhalation of its aerosol, through the skin and by ingestion. 

Inhalation risk
A harmful concentration of airborne particles can be reached quickly when dispersed. 

Effects of short-term exposure
The substance is irritating to the eyes, skin and respiratory tract. The substance may cause effects on the cardiovascular system, nervous system, gastrointestinal tract and kidneys. This may result in severe gastroenteritis, loss of fluids and electrolytes, kidney impairment, cardiac disorders, collapse and shock. Exposure could cause death. The effects may be delayed. Medical observation is indicated. 

Effects of long-term or repeated exposure
Repeated or prolonged contact with skin may cause dermatitis and pigmentation disorders. The substance may have effects on the peripheral nervous system, cardiovascular system, bone marrow, kidneys, liver and mucous membranes. This may result in neuropathy, cardiovascular disorders, lesions of blood cells, kidney impairment, cirrhosis and perforation of the nasal septum. This substance is carcinogenic to humans. Animal tests show that this substance possibly causes toxicity to human reproduction or development. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Melting point: 615°C
Density: 1.87 g/cm³
Solubility in water: very good 
The substance is toxic to aquatic organisms. 

NOTES
Other UN number: 1686 Sodium Arsenite, aqueous solution.
Depending on the degree of exposure, periodic medical examination is suggested.
Do NOT take working clothes home. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.


    See Also:
       Toxicological Abbreviations
       Sodium arsenite (UKPID)