Cobaltous ammonium phosphate

Jump to navigation Jump to search


Dark red to violet crystals. Cobaltous ammonium phosphate is used as one nontoxic variant of cobalt violet pigments. It is used as a colorant in paints, glass, glazes, enamels and plastics.

Synonyms and Related Terms

cobalt violet deep; Pigment Violet 49; CI 77362; Kobalt Ammonium Phosphat (Deut.); fosfato de amonio cobalto (Esp.); fosfato di ammonio e cobalto (It.); ammonium cobaltous phosphate; cobalt ammonium phosphate


  • Skin contact may cause allergies, especially on elbows, neck and ankles.
  • Chronic inhalation may cause asthma.
  • Ingestion may cause vomiting, diarrhea and the sensation of hotness.

Physical and Chemical Properties

Soluble in most acids. Insoluble in water.

Composition CoNH4PO4

Resources and Citations

  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993