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SODIUM ARSENITE ICSC: 1603
Date of Peer Review: October 2005

Arsenious acid, sodium salt
Sodium meta-arsenite
Sodium dioxoarsenate
CAS # 7784-46-5 NaAsO2
RTECS # CG3675000 Molecular mass: 129.9
UN # 2027
EC Index # 033-002-00-5
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.
Closed system and 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.
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 take to a doctor.
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 special equipment. Sweep spilled substance into sealable plastic containers. Carefully collect remainder, then remove to safe place.
Unbreakable packaging; put breakable packaging into closed unbreakable container. Do not transport with food and feedstuffs.
EU 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
EMERGENCY RESPONSE 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, food and feedstuffs.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2005

SEE IMPORTANT INFORMATION ON BACK
SODIUM ARSENITE ICSC: 1603
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
WHITE OR GREY HYGROSCOPIC POWDER

CHEMICAL DANGERS:
Upon heating, toxic fumes are formed. Reacts with acids and strong oxidants to produce toxic arsine gas (see ICSC 0222). Attacks many metals forming flammable/explosive gas (hydrogen - see ICSC 0001) and arsine.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: (as As) 0.01 mg/m as TWA; A1 (confirmed human carcinogen); BEI issued; (ACGIH 2005).
MAK: (arsenic and inorganic arsenic compounds); EKA, BLW issued; Carcinogen category: 1; Germ cell mutagen group: 3A; (DFG 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 the skin and the respiratory tract. The substance may cause effects on the cardiovascular system, nervous system, gastrointestinal tract and kidneys, resulting in severe gastroenteritis, loss of fluids and electrolytes, kidney impairment, cardiac disorders, collapse, shock. Exposure may result in 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, pigmentation disorders. The substance may have effects on the peripheral nervous system, cardiovascular system, bone marrow, kidneys, liver and mucous membranes, resulting in neuropathy, cardiovascular disorders, lesions of blood cells, kidney impairment, cirrhosis and perforation of nasal septum. This substance is carcinogenic to humans. Animal tests show that this substance possibly causes toxicity to human reproduction or development.
PHYSICAL PROPERTIES
Melting point: 615C
Density: 1.87 g/cm
Solubility in water: very good
ENVIRONMENTAL DATA
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


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 2005