Sodium Selenite Pentahydrate (CAS: 10233-13-3, EINECS: 233-267-9, HS Code: 2842909000), molecular formula Na₂SeO₃·5H₂O, molecular weight 263.01. It is white crystalline powder or granular crystal, soluble in water, slightly soluble in ethanol, with stable chemical properties under normal temperature. We supply feed grade and agricultural fertilizer grade products that meet international feed and agricultural standards. It is the most mainstream inorganic selenium source, providing essential selenium trace element for animals and crops, widely used in feed premix, foliar selenium fertilizer and food nutrition fortifier raw materials.
| Items | Specifications |
| Na₂SeO₃·5H₂O Content | ≥97.0% |
| Selenium (Se) Content | ≥29.7% |
| White Crystal Powder/Granule | White Crystal |
| ≤1.0% | ≤1.5% |
| ≤10 ppm | ≤20 ppm |
| ≤5 ppm | ≤10 ppm |
Applications
Animal Feed Industry (Core Application)
Core selenium trace element additive for premix feed, livestock, poultry and aquafeed. Selenium is an essential antioxidant trace element for animals; adding sodium selenite can enhance animal immunity, prevent white muscle disease, improve reproductive performance of breeding stock, increase egg laying rate and meat quality, and is the most cost-effective selenium source for feed factories worldwide.
Agricultural Fertilizer Industry
Selenium-enriched foliar fertilizer and root fertilizer raw material for selenium-rich grains, fruits, vegetables and tea crops. It supplements selenium element in soil, promotes crop photosynthesis, improves stress resistance of crops, and produces selenium-rich agricultural products that meet human nutritional selenium intake requirements.
Food & Health Supplement Field
Raw material for selenium nutritional fortifiers in health food and selenium-enriched food (used after dilution and compounding). It participates in human antioxidant enzyme synthesis, enhances human immunity, and is used in selenium supplement capsules, tablets and nutritional powders.
Pharmaceutical & Biochemical Industry
Biochemical reagent for cell culture medium preparation, raw material for selenium-containing oral health preparations, and experimental reagent for oxidative stress related pharmacological research.
Electroplating & Surface Treatment
Auxiliary additive for alkaline electroplating baths, improves coating brightness and corrosion resistance of metal plating layers, and also used as chemical polishing auxiliary for metal alloys.
Water Treatment & Chemical Analysis
Standard analytical reagent for detecting heavy metal ions in water samples; trace selenium supplement for aquaculture water body to balance aquatic organism nutritional needs.
Product Advantages
✅ High selenium content & high absorption efficiency: Up to 30% selenium content, animal and crop absorption rate is significantly higher than organic selenium sources, low addition dosage
✅ Stable crystal property: Uniform white crystal, not easy to agglomerate, good dispersibility when mixed with feed or fertilizer raw materials
✅ Dual grade options: Feed grade with strict heavy metal control for animal breeding; agricultural grade for selenium fertilizer production, flexible matching different downstream needs
✅ Wide compatibility: Compatible with various trace mineral premixes, vitamins and fertilizer raw materials, no chemical precipitation reaction
✅ Mature production process: Strict recrystallization purification, stable batch index, suitable for large-scale continuous mixing production
✅ Complete certification support: Feed safety inspection reports, MSDS, COA and customs clearance documents can be fully provided for export
Packaging & Storage
Standard packaging: 25kg kraft paper bags with double food-grade PE inner liner; 1kg/5kg small aluminum foil bags for laboratory and sample orders. Store in cool, dry, ventilated warehouse, tightly sealed to avoid moisture and light decomposition. Separated from food, feed raw materials, strong acids and oxidants. Strictly prevent accidental ingestion. Shelf life: 24 months under sealed storage.
Safety Information
Classified as Class 6.1 toxic substance for transportation (UN 3283, Packing Group II). This product is toxic if swallowed, irritating to skin, eyes and respiratory tract. Wear dust mask, acid-resistant gloves and protective goggles during operation, avoid inhalation of dust and long-term skin contact. In case of accidental ingestion, induce vomiting and seek medical treatment immediately; for eye contact, rinse with plenty of clean water for more than 15 minutes. Complete MSDS, feed safety certificate and full inspection COA available upon request.
With 15 years of experience in chemical foreign trade, we offer the following core strengths to support your procurement needs:
1.A 70,000 ㎡ warehouse (20,000 MT capacity) with moisture-proof and temperature-controlled systems, enabling efficient fulfillment of large-volume orders.
2.Free samples (Ship within 3-7 days) to let you test products at zero trial cost.
3.Transparent lead time for hazardous chemicals: 45–60 days, with clear delivery schedules.
4.Certified with a Hazardous Chemical Business License and ISO certification, ensuring smooth customs clearance.
5.6 packaging options with customizable logos to minimize product loss during transportation.
6.Over 400 chemical SKUs available for one-stop procurement, helping you reduce sourcing costs.
Please share your purchase volume, target market, and other requirements, and we will tailor a customized solution for you!
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