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Updated live from Wikipedia, last check: May 30, 2012 11:32 UTC (52 seconds ago)

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Calcium arsenate
Other names Calcium orthoarsenate
Cucumber dust
Identifiers
CAS number 7778-44-1
PubChem 24501
RTECS number CG0830000
Properties
Molecular formula Ca3As2O8
Molar mass 398.072 g/mol
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
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Calcium arsenate (Ca3(AsO4)2) is an extremely poisonous chemical compound. It was originally used as a pesticide and as a germicide. It is highly soluble in water, as compared with lead arsenate, which makes it more toxic.

Preparation

Calcium arsenate is prepared from a reaction of calcium chloride with sodium arsenate.

Safety and health concerns

Currently, the substance is banned from the use for plant protection by the UK government [1].

References

  1. ^ Chemicals Regulation Directorate. "Banned and Non-Authorised Pesticides in the United Kingdom". http://www.pesticides.gov.uk/approvals.asp?id=55. Retrieved 1 December 2009.  
  • Sunset Western Garden Book, First Edition, 1954







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