SELENIUM DIOXIDE

• Catalog No.: Selenium_dioxide
• CAS Number: 7446-08-4
• M. F.: O2Se
• M. W.: 110.9588

SYNONYMS

• IUPAC name: (oxo-λ^6-selanylidene)oxidane
• IUPAC Traditional name: (oxo-λ^6-selanylidene)oxidane
• Synonyms: Selenous anhydride; Selenium(IV) oxide

DATABASE IDS

• Unique Ingredient Identifier: 9N3UK29E57
• PubChem CID: 24007
• Chemspider ID: 22440
• CAS Number: 7446-08-4
• Wikipedia Title: Selenium_dioxide

PROPERTIES

• pKa: 2.62; 8.32
• Apperance: White, yellowish white, or red crystalline solid
• Boiling Point: 350 °C subl.
• Density: 3.954 g/cm^3, solid
• Flash Point: Non-flammable
• Melting Point: 340 °C (sealed tube)
• Odor: rotten radishes
• Refractive Index: > 1.76
• Solubility: 38.4 g/100 mL (20 °C) ; 39.5 g/100 ml (25 °C) ; 82.5 g/100 mL (65 °C) in water
• Solubility: soluble in benzene
• Solubility: 6.7 g/100 mL (15 °C) in ethanol
• Solubility: 4.4 g/100 mL (15 °C) in acetone
• Solubility: 1.11 g/100 mL (14 °C) in acetic acid
• Solubility: 10.16 g/100 mL (12 °C) in methanol
• Vapor Pressure: 1.65 kPa (70 °C)
• EU Index: 034-002-00-8
• European Hazard Symbols: Toxic (T)
• European Hazard Symbols: Dangerous for the environment (N)
• NFPA704:
  

  0

  3

  0
• Risk Statements: R23/25, R33, R50/53
• RTECS: VS8575000
• Safety Statements: S1/2, S20/21, S28, S45, S60, S61
• UN Number: 3283