Selenium dioxide (SeO2)7446-08-4 is white tetragonal crystals; acidic taste; leaves a burning sensation; density 3.95 g/cm3; sublimes at 315°C forming greenish yellow vapors with a sour and pungent odor; melts at 340 to 350°C; vapor pressure 12.5 torr at 70°C; soluble in water, 38.4 g/100mL at 14°C; highly soluble in hot water 82.5 g/100mL at 65°C; soluble in benzene; moderately soluble in ethanol and acetone 6.7 and 4.4g/100mL solvent, respectively, at 15°C; sparingly soluble in acetic acid (1.11g/100mL at 14°C).
Selenium dioxide7446-08-4 has a sour and pungent odor. Odor threshold in air50.0002 milligram per cubic meter. In the manufacture of other selenium compounds; as a reagent for alkaloids; as oxidizing agent: L. F. Fieser, M. Fieser, Reagents for Organic Chemistry vol. 1 (New York, Wiley, 1967) p 992. Selenium dioxide (SeO2) is used as an oxidizing agent, as a catalyst, and as an antioxidant for lubricating oils and grease.
Product Name
Selenium dioxide
CAS NO
7446-08-4
Appearance
White crystalline powder
Assay
99.0-101.0%
Grade
Pharmaceutical grade
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