Bismuth oxide

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Description

Chemical structure

Bismuth oxide.jpg

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

Risks

  • 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.
  • ThermoFisher: SDS

Physical and Chemical 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 C
Density 8.8 - 8.9 g/ml
Molecular Weight mol. wt. = 465.96
Boiling Point 1890 C

Resources and Citations

  • 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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