ICSC 1208 - SODIUM ARSENATE DIBASIC

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SODIUM ARSENATE DIBASIC

ICSC: 1208
_{March 1999}

Arsenic acid disodium salt
Disodium arsenate
Disodium hydrogen arsenate

CAS No: 7778-43-0
RTECS No: CG0875000
UN No: 1685
EC No: 033-005-00-1

AsHNa₂O₄ / HNa₂AsO₄
Molecular mass: 185.9

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. Weakness. 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. 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 behind the breastbone and in the mouth. Diarrhoea. Vomiting.	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
Chemical protection suit including self-contained breathing apparatus. Do NOT let this chemical enter the environment. Vacuum spilled material. Carefully collect remainder, then remove to safe place.	T Symbol N Symbol R: 45-23/25-50/53 S: 53-45-60-61 Note: A, E UN Hazard Class: 6.1 UN Pack Group: II	Unbreakable packaging; put breakable packaging into closed unbreakable container. Do not transport with food and feedstuffs. Marine pollutant.

EMERGENCY RESPONSE	SAFE STORAGE
Transport Emergency Card: TEC (R)-61GT5-II	Separated from acids, food and feedstuffs. Provision to contain effluent from fire extinguishing. Well closed.

IMPORTANT DATA

Physical State; Appearance
COLOURLESS TO WHITE CRYSTALS OR POWDER.

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/m³; A1 (confirmed human carcinogen); BEI issued; (ACGIH 2004).
MAK: Carcinogen category: 1; Germ cell mutagen group: 3A; (DFG 2004).

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

Inhalation risk
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, 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 gastrointestinal tract, cardiovascular system, central nervous system, kidneys, resulting in severe gastroenteritis, loss of fluids and electrolytes, cardiac disorders kidney impairment, collapse, shock, and death. Exposure 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, skin, mucous membranes, 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 malformations in human babies.

PHYSICAL PROPERTIES	ENVIRONMENTAL DATA
Melting point: 57°C Density: 1.87 g/cm³ Solubility in water, g/100 ml at 15°C: 61	This substance may be hazardous in 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

Depending on the degree of exposure, periodic medical examination is suggested.
Do NOT take working clothes home.
Card has been partly updated in April 2005. See sections Occupational Exposure Limits, Emergency Response. October 2005: see section Effects of long-term or repeated exposure.

IPCS
International
Programme on
Chemical Safety

Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004

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