Bismuth oxide

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A heavy yellow powder that occurs naturally as the mineral bismite. Bismuth oxide, also called bismuth yellow, is used as a Pigment for enamels, Glass, ceramics, and Porcelain.

Synonyms and Related Terms

bismuth trioxide; óxido de bismuto (Esp., Port.); oxyde de bismuth (Fr.); ossido di bismuto (It.); bismite; bismuth yellow

Chemical structure

Bismuth oxide.jpg

Other Properties

Soluble in acid. Insoluble in water. Color is yellow to green

Composition Bi2O3
CAS 1304-76-3
Mohs Hardness 4-5 (for bismite)
Melting Point 820
Density 8.8 - 8.9
Molecular Weight mol. wt. = 465.96
Boiling Point 1890

Hazards and Safety

Ingestion may cause slight discomfort. Chronic ingestion may produce black lines on gums and bad breath. Inhalation and contact are not expected to be hazardous.

Mallinckrodt Baker: MSDS

Sources Checked for Data in Record

  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 1314

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