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DISODIUM ARSENATE HEPTAHYDRATE

ICSC: 0326

Arsenic acid, disodium salt, heptahydrate
Sodium arsenate heptahydrate
Sodium arsenate, dibasic, heptahydrate
Na2HAsO4• 7H2O
Molecular mass: 312.0
ICSC #    0326
CAS #     10048-95-0
RTECS # CG0900000
UN #        1685
EC #         033-005-00-1
October 20, 2005 Validated

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. Give a slurry of activated charcoal in water to drink. Refer for medical attention.

SPILLAGE DISPOSAL

STORAGE

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.
Store in an area without drain or sewer access. Well closed. Separated from acids, food and feedstuffs .
Unbreakable packaging; put breakable packaging into closed unbreakable container. Do not transport with food and feedstuffs.
Marine pollutant.
Note: A; E
T symbol
N symbol
R: 45-23/25-50/53
S: 53-45-60-61
UN Hazard Class: 6.1
UN Packing Group: II
ICSC: 0326 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

DISODIUM ARSENATE HEPTAHYDRATE

ICSC: 0326

I

M

P

O

R

T

A

N

T


D

A

T

A

PHYSICAL STATE; APPEARANCE:
COLOURLESS CRYSTALS

PHYSICAL DANGERS:


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 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): 180°C
Melting point: 130°C
Density: 1.9
g/cm3
Solubility in water, g/100 ml at 21°C: 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.

N O T E S

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.
Transport Emergency Card: TEC (R)-61GT5-II
Card has been partially updated in January 2008: see Ingestion First Aid.

ADDITIONAL INFORMATION



ICSC: 0326 DISODIUM ARSENATE HEPTAHYDRATE
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
 
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