A reddish-brown crystalline material occasionally used as a transparent pigment in oil and watercolor paints. Iron dichromate is prepared by heating hydroxide ferric hydroxide in acid chromic acid or by mixing chromate potassium chromate with sulfate iron sulfate.
Synonyms and Related Terms
basic iron chromate; ferric dichromate; dicromato de ferro (Port.)
Soluble in water and acids.
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.
H. Kuhn, M.Curran, "Chrome Yellow and Other Chromate Pigments", Artists Pigments, Volume 1, R. Feller (ed.), Cambridge University Press: Cambridge, 1986.
- Richard S. Lewis, Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993