Selenium dioxide
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Description
Yellowish-white, shiny crystals that reacts with moisture to produce a pungent smelling greenish vapor. Selenium dioxide is used in photographic toning baths and in the manufacture of red and pink glass and glazes.
Synonyms and Related Terms
selenium oxide; selenium (IV) oxide; selenous acid anhydride; selenious anhydride
Risks
- Toxic by ingestion, inhalation and contact.
- Corrosive in the presence of moisture.
- Integra CHem: SDS
Physical and Chemical Properties
- Soluble in ethanol, water; sulfuric acid.
- Crystals are four-sided needles.
| Composition | SeO2 |
|---|---|
| CAS | 7446-08-4 |
| Melting Point | 340-350 C (sublimes) |
| Density | 3.954 g/ml |
| Molecular Weight | mol. wt. = 110.9 |
| Refractive Index | >1.76 |
Resources and Citations
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 696
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
- The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 8576
- CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: ref. index= >1.76