Molybdate orange

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Description

A deep, reddish-orange synthetic pigment. Patented in 1930 by Lederle in Germany, molybdate orange is a solid solution of lead chromate, lead molybdate, and lead sulfate. The toxic pigment has uniform, small, rounded particles and a high refractive index. Molybdate orange has good covering power but moderate lightfastness. It is used industrially in printing inks, paints, and plastic.

Synonyms and Related Terms

molybdenum orange; Pigment Red 104; CI 77605; anaranjado de molibdeno (Esp.); Molybdatorange (Deut.); orange de molybdate (Fr.); arancio di molibdeno (It.); molybdaatoranje (Ned.); molybdate red; molybdate chrome orange; moly orange; chrome vermilion

Other Properties

Small, round, uniform particles. Moderate birefringence.

Composition 7PbCrO4-PbMoO4-2PbSO4
CAS 12656-85-8
Refractive Index 2.55

Hazards and Safety

Toxic by ingestion and inhalation.

Human carcinogen, teratogen and suspected mutagen.

Skin contact may cause irritation and ulcers.

Additional Information

M.de Keijzer "A Brief Survey of the Synthetic Inorganic Artists' Pigments Discovered in the 20th Century" ICOM Preprints, Dresden 1990 p. 214-219.

Sources Checked for Data in Record

  • R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966
  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • The Dictionary of Art, Grove's Dictionaries Inc., New York, 1996 Comment: "Pigments"
  • Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979