2447. Cobaltous Phosphate

Nomenclature

CAS number: 13455-36-2
C.I. Pigment Violet 14; C.I. 77360.
Co3O8P2; mol wt 366.74.
Co 48.21%, O 34.90%, P 16.89%.
Co3(PO4)2.

Description and references

Prepn from CoCl2 and (NH4)2HPO4: Klement, Haselbeck, Z. Anorg. Allg. Chem. 334, 27 (1964); from Ca(H2PO4)2: Vickery, US 2914380 (1959 to Horizons). Review: de Bie, Doyen, Cobalt 15, 3-13; 16, 3-15 (1962). See also Colour Index vol. 4 (3rd ed., 1971) p 4665.

Derivative

Octahydrate.

Properties

Pink to lavender amorph powder. d 2.77. Practically insol in water; sol in mineral acids.

Use

In ceramic pigments; in artists' colors, plastic resins.