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CALCIUM ARSENATE

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Name CALCIUM ARSENATE EINECS
CAS No. 7778-44-1 Density
Solubility Melting Point
Formula AsH3 O4 . 3/2 Ca Boiling Point
Molecular Weight 398.08 Flash Point
Transport Information Appearance
Safety Confirmed human carcinogen. Poison by ingestion. Moderately toxic by skin contact. When heated to decomposition it emits toxic fumes of arsenic. Risk Codes
Molecular Structure Molecular Structure of 7778-44-1 (Arsenic acid (H3AsO4),calcium salt (2:3)) Hazard Symbols
Synonyms

Calciumarsenate (Ca3(AsO4)2) (7CI); Calcium arsenate; Chip-Cal Granular; Cucumberdust; Pencal; Spra-cal; Tricalcium arsenate

 

Chemistry

The Molecular formula of Calcium arsenate (7778-44-1): Ca3As2O8
The Molar mass of Calcium arsenate (7778-44-1): 398.072 g/mol
The Molecular Structure:
Appearance white powder
Density: 3.620 g/cm3, solid
Melting point: 1455°C (decomposes)
Solubility in water: 0.013 g/100 mL (25°C)
Solubility in Organic solvents: insoluble
Solubility in acids: soluble
Other names: Calcium orthoarsenate;Cucumber dust.
Calcium arsenate (7778-44-1) is an extremely poisonous chemical compound. It is highly soluble in water.

Uses

Calcium arsenate (7778-44-1) is used extensively as an insecticide and as a fungicide.

Production

Calcium arsenate (7778-44-1) is produced by the reaction of calcium chloride, calcium hydroxide, and sodium arsenate or lime and arsenic acid:
 2CaCl2 + Ca(OH)2 + 2Na2HAsO4 → Ca3(AsO4)2 + 4NaCl + 2H2O

Toxicity Data With Reference

Calcium arsenate (7778-44-1) is more toxic than lead arsenate.

Consensus Reports

NTP 10th Report on Carcinogens, 2000:known to be human carcinogen

Safety Profile

Confirmed human carcinogen. When heated to decomposition it emits toxic vapors of NOx.
Risk Statements: 23/25-45-50/53
23/25:  Toxic by inhalation and if swallowed 
45:  May cause cancer 
50/53:  Very Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment
Safety Statements: 45-53
45:  In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) 
53:  Avoid exposure - obtain special instruction before use 
RIDADR: 1573
HazardClass: 6.1

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