Difference between revisions of "Iron dichromate"
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== Description == | == Description == | ||
| − | A reddish-brown crystalline material occasionally used as a transparent pigment in oil and watercolor paints. Iron dichromate is prepared by heating [http://cameo.mfa.org/materials/fullrecord.asp?name=ferric | + | A reddish-brown crystalline material occasionally used as a transparent pigment in oil and watercolor paints. Iron dichromate is prepared by heating [http://cameo.mfa.org/materials/fullrecord.asp?name=ferric%20hydroxide ferric hydroxide] in [http://cameo.mfa.org/materials/fullrecord.asp?name=chromic%20acid chromic acid] or by mixing [http://cameo.mfa.org/materials/fullrecord.asp?name=potassium%20chromate potassium chromate] with [http://cameo.mfa.org/materials/fullrecord.asp?name=ferrous%20sulfate iron sulfate]. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
Revision as of 11:03, 13 June 2013
Description
A reddish-brown crystalline material occasionally used as a transparent pigment in oil and watercolor paints. Iron dichromate is prepared by heating ferric hydroxide in chromic acid or by mixing potassium chromate with iron sulfate.
Synonyms and Related Terms
basic iron chromate; ferric dichromate; dicromato de ferro (Port.)
Other Properties
Soluble in water and acids.
| Composition | Fe2(CrO7)3 |
|---|
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.
Additional Information
H. Kuhn, M.Curran, "Chrome Yellow and Other Chromate Pigments", Artists Pigments, Volume 1, R. Feller (ed.), Cambridge University Press: Cambridge, 1986.
Authority
- Richard S. Lewis, Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993