Cobalt violet, deep

Jump to navigation Jump to search
Cobalt violet dark


A medium to strong violet pigment composed of Cobaltous phosphate. Deep cobalt violet was first developed in 1859 by Salvetat and sold as an artists' pigment in 1890. The colorfast pigment has low tinting strength and dries quickly in oil paints.

Synonyms and Related Terms

cobalt phosphate; deep cobalt violet; Pigment Violet 14; CI 77360; violeta de cobalto intenso (Esp.); violet de cobalt (foncé) (Fr.); Kobaltviolett (dunkel) (Deut.); iodes toy kobaltioy skoyro (Gr.); violetto di cobalto scuro (It.); cobalt violet (donker) (Ned.); violeta de cobalto, escuro (Port.)

FTIR (MFA) (Forbes 498)

Cobalt Violet, dark (498).PNG

Raman (MFA) (532nm)

Cobalt violet (Forbes MFA 498), 50X, 532 nm.TIF

Raman (MFA) (785nm)

Cobalt violet dark (Forbes MFA 498), 785nm resize.tif






  • 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

  • Microscopically, the particles are strongly pleochroic with colors from pink to violet to yellow.
  • Highly birefringent under crossed polars.
  • Appears magenta with Chelsea filter.
Composition Co3(PO4)2 - 8H2O
Refractive Index >1.662

Resources and Citations

  • Corbeil, Marie-Claude, Jean-Pierre Charland, Elizabeth Moffatt. 'The characterization of cobalt violet pigments' Studies in Conservation vol.47 (2002), pp.237-249.
  • Nicholas Eastaugh, Valentine Walsh, Tracey Chaplin, Ruth Siddall, Pigment Compendium, Elsevier Butterworth-Heinemann, Oxford, 2004
  • Reed Kay, The Painter's Guide To Studio Methods and Materials, Prentice-Hall, Inc., Englewood Cliffs, NJ, 1983
  • Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
  • Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
  • Thomas B. Brill, Light Its Interaction with Art and Antiquities, Plenum Press, New York City, 1980