Copper(II) phosphate

Copper(II) phosphate (not to be confused with copper(I) phosphate) is an inorganic compound consisting of copper cations and the phosphate anions; with the chemical formula Cu3(PO4)2. It may also be regarded as the cupric salt of phosphoric acid.

Copper(II) phosphate
Names
IUPAC name
copper(II) phosphate
Other names
tricopper diphosphate
tricopper bis(orthophosphate)
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.029.322
UNII
Properties
Cu3(PO4)2
Molar mass 380.580722 g/mol (anhydrous)
434.63 g/mol (trihydrate)
Appearance light bluish-green powder (anhydrous)
blue or olive crystals (trihydrate)
insoluble
Solubility anhydrous:
soluble in ammonia
trihydrate:
soluble in ammonium hydroxide
slightly soluble in acetone
insoluble in ethanol
Structure
orthorhombic (trihydrate)
Hazards
NIOSH (US health exposure limits):
PEL (Permissible)
TWA 1 mg/m3 (as Cu)[1]
REL (Recommended)
TWA 1 mg/m3 (as Cu)[1]
IDLH (Immediate danger)
TWA 100 mg/m3 (as Cu)[1]
Related compounds
Other cations
Iron(II) phosphate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

It is commonly encountered as the hydrated species Cu2(PO4)OH, which is green and occurs naturally as the mineral libethenite. Anhydrous copper(II) phosphate is blue with triclinic crystals and can be produced by a high-temperature reaction between diammonium phosphate and copper(II) oxide.[2]

2 (NH4)2HPO4 + 3 CuO → Cu3(PO4)2 + 3 H2O + 4 NH3

References

  1. NIOSH Pocket Guide to Chemical Hazards. "#0150". National Institute for Occupational Safety and Health (NIOSH).
  2. Shoemaker, G. L.; Anderson, J. B.; Kostiner, E. (15 September 1977). "Copper(II) phosphate". Acta Crystallographica Section B. 33 (9): 2969–2972. doi:10.1107/S0567740877010012.


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