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DISODIUM ARSENATE HEPTAHYDRATE ICSC: 0326
Date of Peer Review: October 2005

Arsenic acid, disodium salt, heptahydrate
Sodium arsenate heptahydrate
Sodium arsenate, dibasic, heptahydrate
CAS # 10048-95-0 Na2HAsO4. 7H2O
RTECS # CG0900000 Molecular mass: 312.0
UN # 1685
EC Index # 033-005-00-1
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 Risk of fire and explosion on contact with some metals, see Chemical Dangers.


EXPOSURE
PREVENT DISPERSION OF DUST! AVOID ALL CONTACT! AVOID EXPOSURE OF (PREGNANT) WOMEN!
IN ALL CASES CONSULT A DOCTOR!
Inhalation Cough. Headache. Sore throat Weakness. Further see Ingestion.
Closed system and ventilation.
Fresh air, rest. Refer for medical attention.
Skin Redness. Pain.
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse and then wash skin with water and soap.
Eyes Redness. Pain.
Face shield or eye protection in combination with breathing protection if powder.
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. Diarrhoea. Vomiting. Shock or collapse.
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Give a slurry of activated charcoal in water to drink. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Chemical protection suit including self-contained breathing apparatus. Do NOT let this chemical enter the environment. Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place.
Unbreakable packaging; put breakable packaging into closed unbreakable container. Do not transport with food and feedstuffs. Marine pollutant.
EU Classification
Symbol: T, N
R: 45-23/25-50/53
S: 53-45-60-61
Note: [A; E]
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. Separated from acids, 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
DISODIUM ARSENATE HEPTAHYDRATE ICSC: 0326
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
COLOURLESS CRYSTALS

CHEMICAL DANGERS:
Upon heating, toxic fumes are formed. Reacts with acids to produce toxic arsine gas (see ICSC 0222). Attacks many metals in presence of water such as iron, aluminium and zinc, releasing toxic fumes of arsenic and arsine.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: (as As) 0.01 mg/m as TWA; A1 (confirmed human carcinogen); BEI issued; (ACGIH 2005).
MAK: 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 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, central nervous system, gastrointestinal tract, kidneys, resulting in cardiac disorders, severe gastroenteritis, loss of fluids and electrolytes, kidney impairment, collapse, shock. Exposure far above the OEL 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. The substance may have effects on the peripheral nervous system, mucous membranes, skin, cardiovascular system, bone marrow, kidneys and liver, resulting in neuropathy, pigmentation disorders, perforation of nasal septum, lesions of blood cells, kidney impairment and cirrhosis. This substance is carcinogenic to humans. Animal tests show that this substance possibly causes toxicity to human reproduction or development.
PHYSICAL PROPERTIES
Boiling point (decomposes): 180C
Melting point: 130C
Density: 1.9 g/cm
Solubility in water, g/100 ml at 21C: 39
ENVIRONMENTAL DATA
This substance may be hazardous to the environment; special attention should be given to ground water contamination, aquatic organisms and soil organisms. This substance does enter the environment under normal use. Great care, however, should be given to avoid any additional release, e.g. through inappropriate disposal.
NOTES
The apparent melting point caused by loss of crystal water is given. Depending on the degree of exposure, periodic medical examination is suggested. Do NOT take working clothes home. Card has been partly updated in October 2005. See section Emergency Response.
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
See Also:
        Sodium arsenate (UK PID)