Strontium chromate

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Description

A pale yellow pigment that is also called strontium yellow. Strontium yellow was used in oil paints in the late 19th and early 20th centuries. It has good opacity and stability to light and heat. But because of its high hiding power, strontium chromate was not used in watercolors. Commercially strontium chromate was often mixed with other pigments; a mixture with Prussian blue was sold as green cinnabar and a mixture with barium yellow and zinc yellow was sold under the name lemon yellow or citron yellow. Currently strontium yellow is used in anticorrosive coating and pyrotechnics.

Synonyms and Related Terms

lemon yellow; strontium yellow; Pigment Yellow 32; CI 77839; cromatpo de estroncio (Esp.); chromate de strontium (Fr.); cromato de estrôncio (Port.); strontium chrome; strontaine yellow; green cinnabar; lemon yellow; citron yellow

FTIR

MFA- Strontium Yellow.jpg


Other Properties

Soluble in dilute acids and hot water. Slightly soluble in cold water.

Composition SrCrO4
CAS 7789-06-2
Density 3.89
Molecular Weight mol. wt. = 203.62
Refractive Index 1.92; 2.01

Hazards and Safety

Human carcinogen. Skin contact may cause allergies. Acute ingestion may cause fatal chromium poisoning. Chronic inhalation may cause lung cancer and respiratory irritation.

LINK: International Chemical Safety Card

Additional Information

H. Kuhn, M.Curran, "Chrome Yellow and Other Chromate Pigments", Artists Pigments, Volume 1, R. Feller (ed.), Cambridge University Press: Cambridge, 1986.

Sources Checked for Data in Record

  • R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966
  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 610
  • Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
  • Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 9001