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7778-43-0

Name SODIUM ARSENATE
CAS 7778-43-0
EINECS(EC#) 231-902-4
Molecular Formula AsHNa2O4
MDL Number MFCD00003495
Molecular Weight 185.91
MOL File 7778-43-0.mol

Chemical Properties

Appearance Clear, colorless crystals; mild alkaline taste. Soluble in water; slightly soluble in alcohol and glycerol; insoluble in ether.
Melting point  86℃ [HAW93]
Boiling point  decomp at 150°C
density  1.7539 [HAW93]
solubility  soluble in H2O; slightly soluble in ethanol; insoluble in ethyl ether
color  Colorless white powder or solid, effloresces
Water Solubility  g/100g solution H2O: 5.59 (0.1°C), 29.33 (25°C), 66.5 (98.5°C); solid phase, Na2HAsO4 ·12H2O (0.1°C), Na2HAsO4 ·7H2O (25°C), Na2HAsO4(98.5°C) [KRU93]; slightly soluble alcohol [MER06]
Contact allergens
Arsenic salts are sensitizers, but most often irritants. They are used in copper or gold extraction, glass, feeds, weedkillers, insecticides, and ceramics. A recent case was reported in a crystal factory worker with positive patch tests to sodium arsenate.
Uses
Mordant and assist in dyeing and printing, other arsenates, germicide.
EPA Substance Registry System Arsenic acid (H3AsO4), disodium salt (7778-43-0)

Safety Data

RIDADR  1685
HazardClass  6.1(a)
PackingGroup  II
HS Code  28429090
storage It is important to keep stored organic arsenic compounds in a cool, dry, well-ventilated area in tightly sealed containers and with proper labels and identifi cation. The storage containers of organic arsenic compounds should be protected from physical damage and stored separately from oxidizers such as perchlorates, peroxides, permanganates, chlorates, or nitrates, and strong acids such as hydrochloric, sulfuric, or nitric acid. Further, specifi c organic arsenic compounds must have separate storage requirements, which should be evaluated prior to storage.
Precautions During handling and use of arsenic compounds, workers should use appropriate personal protective clothing and equipment. Users/workers must be careful during use, and maintain effective measures to prevent skin contact with organic arsenic compounds. The selection of the appropriate personal protective equipment (PPE), such as gloves, sleeves, and encapsulating suits should be based on the extent of the worker’s potential exposure to organic arsenic compounds. The users and the management should periodically evaluate and determine the effectiveness of the chemical-resistant clothing in preventing dermal contact and ensuring users’ safety.
Safety Profile
Confirmed human carcinogen. Poison by intraperitoneal route. Human mutation data reported. When heated to decomposition it emits toxic fumes of arsenic. See ARSENIC COMPOUNDS.
Hazardous Substances Data 7778-43-0(Hazardous Substances Data)
Toxicity
cyt-hmn:leu 7200 mmol/L MUREAV 88,73,81

Hazard Information

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