Basic Information of Selenium Dioxide
- Product Name (English): Selenium Dioxide
- English aliases: Selenium(IV) oxide, Selenious anhydride
- Industry Abbreviations: SeO2
- Other language names: Dioxyde de sélénium (French), Selen(IV)-oxid (German), Диоксид селеназа(IV)(Russian),셀레늄(IV) 산화물(Korean),ديออกسي드 السيلينيوم (IV)(Arabic)
- CAS number: 7446-8-4
- EINECS number: 231-194-7
- UN number: 2811
- Hazard class: 6.1 (Toxic substances)
- Molecular formula: SeO2
- Molecular weight: 110.96 g/mol
- Product Grade: Industrial grade, Analytical reagent (AR), Pharmaceutical grade
- Main uses: Oxidizing agent in organic synthesis, glass colorant, catalyst, semiconductor material, insecticide
Physicochemical Properties of Selenium Dioxide
- Appearance and smell: White crystalline powder or colorless crystals, has a pungent odor (like nitric acid)
- Solubility: Soluble in water (forms selenous acid), soluble in ethanol, acetone, sulfuric acid
- Boiling point: 315 °C (sublimes)
- Melting point: 340 °C
- Density: 3.954 g/cm³
- Moisture absorption: Hygroscopic, absorbs moisture from air to form selenous acid
- Purity: Selenium content: 69%
- Toxicity: Highly toxic if swallowed, inhaled or absorbed through skin
- Stability: Stable under normal conditions, strong oxidizing agent; avoid contact with reducing agents and organic matter
- Particle size: 100-200 mesh (industrial grade), crystalline (analytical grade)
Supplementary Technical Details for Selenium Dioxide
- Production methods: Oxidation of selenium metal with oxygen or nitric acid, thermal decomposition of selenates
- Acute toxicity (LD50): 8 mg/kg (oral, rat); 1.6 mg/kg (intraperitoneal, mouse)
- Chronic toxicity: Long-term exposure may cause selenium poisoning, respiratory damage and neurological effects
- Upstream and downstream products (raw materials): Selenium metal, oxygen, nitric acid
- Upstream and downstream products (downstream): Selenous acid, sodium selenite, pharmaceuticals, glass products
- Quality Standards: GB/T 16105-2008, ACS reagent standards (USA)
- Detection methods: Atomic absorption spectrometry, titration analysis, spectrophotometry
- Transportation methods: Road transport, sea transport (strictly comply with IMDG code for toxic substances)
- Payment methods: T/T, L/C
Packaging and Storage of Selenium Dioxide
- Packaging: 1 kg glass bottles or plastic bottles, 25 kg fiber drums with double plastic liners and sealed caps
- Storage: Store in airtight containers in cool, dry, well-ventilated warehouse; keep away from heat, reducing agents and organic matter
- Shelf Life: 24 months when stored properly in sealed containers
- CAS number: 7446-8-4
- Molecular formula: SeO2
- Molecular weight: 110.96 g/mol
- Implementation Standards: GB/T 16105-2008, ACS, ISO standards
- Precautions: Strictly avoid skin contact and inhalation; use in fume hood; wear full protective equipment
- After-sales service: Safety data sheet (SDS), technical support, quality guarantee
Applications of Selenium Dioxide
Medical Field
- Pharmaceutical-grade Selenium Dioxide can react with sodium carbonate to produce water-soluble sodium selenite, which is one of the raw materials for selenium supplements.It can prevent and treat Keshan disease, Kashin-Beck disease, etc., and is effective and safe when taken orally.
- Certain selenium compounds in pharmaceutical-grade Selenium Dioxide have inhibitory effects on various cancer cells, including those of cervical cancer, lung cancer, lung adenocarcinoma, and liver cancer.
- Pharmaceutical-grade Selenium Dioxide can be used as an oxidizing agent and catalyst in the preparation of organic synthetic drugs;Or, it can be used as a selenium source and as a starting material for various biologically active organoselenium compounds.
- High-purity Selenium Dioxide can be further processed into sodium selenite or sodium selenate, which, under the guidance of livestock and veterinary professionals, can be added to animal feed as a trace element supplement to prevent white muscle disease in cattle and sheep.
Analytical Reagents
- Reagent-grade Selenium Dioxide can be used for structural analysis of organic compounds and for the detection of trace elements.
- Reagent-grade Selenium Dioxide can be used in the preparation of primary reference materials and as a reference standard in sample pretreatment for modern instrumental analysis.
- Reagent-grade Selenium Dioxide can be used in laboratories for research in plant physiology and pathology.
Industrial Sector
- Industrial-grade Selenium Dioxide can be used as a glass coloring and decolorizing agent, imparting pink and red hues to special types of glass, and enabling the production of highly transparent optical glass and display tube glass.
- Industrial-grade Selenium Dioxide can be used for cleaning and etching semiconductor components, and is also a raw material for manufacturing selenide semiconductors used in photodetectors and solar cells.
- Industrial-grade Selenium Dioxide can be used as an additive in electroplating solutions, improving the appearance and corrosion resistance of the plating layer, increasing its density and hardness, and reducing internal stress.
- Industrial-grade Selenium Dioxide can be used to manufacture high-purity selenium, selenium compounds, and selenium-containing catalysts, and can also be used in the synthesis of ortho-dicarbonyl compounds.
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