Basic Information of Selenious Acid
- Product Name (English): Selenious Acid
- English aliases: Selenium(IV) acid, Selenic(IV) acid
- Industry Abbreviations: H2SeO3
- Other language names: Acide sélénieux (French), Selenige Säure (German), Селеновая кислота(IV)(Russian),셀레늄산(IV)(Korean),حمض السيليينيي (IV)(Arabic)
- CAS number: 7783-00-8
- EINECS number: 231-974-7
- UN number: 2811
- Hazard class: 6.1 (Toxic substances)
- Molecular formula: H2SeO3
- Molecular weight: 128.97 g/mol
- Product Grade: Industrial grade, Analytical reagent (AR), Pharmaceutical grade
- Main uses: Chemical reagent, oxidizing agent, pharmaceutical intermediate, manufacture of selenium compounds
Physicochemical Properties of Selenious Acid
- Appearance and smell: White crystalline solid or colorless solution, has a pungent odor
- Solubility: Highly soluble in water, soluble in ethanol
- Boiling point: 260 °C (decomposes)
- Melting point: 70 °C
- Density: 3.004 g/cm³ (solid)
- Moisture absorption: Hygroscopic, easily absorbs moisture to form solution
- Purity: 98% min (industrial grade), 99.5% min (analytical grade)
- Toxicity: Highly toxic if swallowed, inhaled or absorbed through skin
- Stability: Stable under normal conditions, strong oxidizing agent; avoid contact with reducing agents
- Particle size: Crystalline (solid), solution (liquid)
Supplementary Technical Details for Selenious Acid
- Production methods: Dissolution of selenium dioxide in water, oxidation of selenium with nitric acid
- Acute toxicity (LD50): 6 mg/kg (oral, rat)
- Chronic toxicity: Long-term exposure may cause selenium poisoning and respiratory damage
- Upstream and downstream products (raw materials): Selenium dioxide, selenium, nitric acid, water
- Upstream and downstream products (downstream): Sodium selenite, Selenious Acid, pharmaceuticals, chemical reagents
- Quality Standards: GB/T 16106-2008, ACS reagent standards
- Detection methods: Atomic absorption spectrometry, titration analysis, spectrophotometry
- Transportation methods: Road transport, sea transport (complies with IMDG code for toxic substances)
- Payment methods: T/T, L/C, Western Union
Packaging and Storage of Selenious Acid
- Packaging: 1 kg plastic bottles (solid), 25kg/drum
- Storage: Store in airtight containers in cool, dry, well-ventilated warehouse; keep away from reducing agents and organic matter
- Shelf Life: 12 months (solution), 24 months (solid) when stored properly
- CAS number: 7783-00-8
- Molecular formula: H2SeO3
- Molecular weight: 128.97 g/mol
- Implementation Standards: GB/T 16106-2008, ACS, ISO standards
- Precautions: Use in fume hood; wear full protective equipment; avoid contact with skin and eyes
- After-sales service: Safety data sheet (SDS), technical support, quality guarantee
Applications of Selenious Acid
Pharmaceutical Field
- Pharmaceutical-grade Selenous Acid can be used to treat and prevent selenium deficiency.For example: Keshan disease, Kashin-Beck disease, or clinical selenium deficiency due to other causes.H2SeO3 is administered orally (as tablets/solution) or by injection.
- Pharmaceutical-grade Selenous Acid, as a source of selenium, has diverse applications and research value.Such as,antioxidant and anti-inflammatory support;adjunctive treatment for thyroid diseases;exploration of tumor prevention and adjuvant therapy, etc.
Food Sector
- Selenous Acid is generally not used directly as a food additive or nutritional supplement.However, salt forms of selenite (sodium selenite, sodium selenate, organic selenium, etc.) can be used as additives in certain foods.In order to supplement the body’s deficiency of the trace element selenium.
- Feed-grade Selenous Acid generally refers to feed-grade selenium supplements (in the form of sodium selenite or organic selenium).By precisely calculating the dosage, its antioxidant, disease-resistant, and growth-promoting functions can be maximized.
Industrial Sector
- Industrial-grade Selenous Acid is used in the glass industry as a decolorizing agent (for high-grade crystal glass, optical glass, etc.) and a coloring agent (for signal lights, decorative glass, etc.) due to its unique physicochemical properties.
- Industrial-grade Selenous Acid can be used in the preparation of special pigments and coatings, possessing characteristics such as high temperature resistance, good weather resistance, vibrant colors, and stable performance.
- Industrial-grade Selenous Acid is a key catalyst in the electrolytic manganese industry; adding even a tiny amount of selenite can improve electrolysis efficiency.At the same time, it can also improve the performance of manganese plates and reduce costs.
- High-purity Selenous Acid is the main raw material for synthesizing semiconductor materials such as cadmium selenide, zinc selenide, and lead selenide.Its derivatives serve as a chemical bridge for high-end electronic and optoelectronic products.
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