Tungsten trioxide
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Description
Yellow powder used as for fireproofing textiles. Tungsten trioxide, or anhydrous tungstic acid, is also used as a high temperature yellow Pigment in ceramics.
Synonyms and Related Terms
anhydrous tungstic acid; anhydrous wolframic acid; tungstic oxide; tungsten oxide
Risks
- Toxic by ingestion and inhalation.
- Noncombustible.
- Fisher Scientific: MSDS
Physical and Chemical Properties
Soluble in hydrofluoric acid and alkalis.
| Composition | WO3 |
|---|---|
| CAS | 1314-35-8 |
| Melting Point | 1473 C |
| Density | 7.16 g/ml |
| Molecular Weight | mol. wt. = 231.86 |
Resources and Citations
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 694
- 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 9946
- Susan E. Schur, Conservation Terminology: A review of Past & Current Nomenclature of Materials, Technology and Conservation, Spring (p.34-39); Summer (p.35-38); Fall (p.25-36), 1985
- Robert Fournier, Illustrated Dictionary of Practical Pottery, Chilton Book Company, Radnor, PA, 1992