What is Selenium Powder?
Selenium Powder, elemental selenium, CAS No.7782‑49‑2, is a dark‑grey to black fine powder with metallic luster. It belongs to semi‑metal element. It is insoluble in water and ethanol, soluble in strong oxidizing acids. Industrial mainstream purities include 99.5%, 99.9%, 99.99%. It is easy to produce toxic selenium‑containing fume under high‑temperature heating.
What are major industrial applications of Selenium Powder?
- Glass & Ceramic Industry Selenium powder acts as glass decolorizer and colorant. It offsets green tint caused by iron impurities inside raw glass materials, producing clear colorless glass. It can also manufacture red‑tinted decorative glass and ceramic glaze colorants.
- Metallurgy & Alloy Manufacturing Added into copper, lead and stainless‑steel alloys to improve machinability, wear resistance and mechanical performance. Widely applied for special alloy smelting in non‑ferrous metal factories.
- Chemical Industry Key raw material for producing selenium compounds, selenium salts, photocatalytic materials and fine chemical intermediates.
- Electronic & Photovoltaic Industry High‑purity selenium powder is used for photosensitive components, semiconductor materials and thin‑film solar cell raw materials.
- Rubber Additive Used as vulcanization modifier for special rubber to enhance rubber aging‑resistance and physical properties.
Which purity grade of selenium powder should you pick?
- 99.5% Industrial Grade: For glass decoloring, ordinary alloy smelting, general chemical synthesis, cost‑effective for large‑volume bulk purchase.
- 99.9% Grade: For high‑quality colored glass, precision alloy production and standard chemical reagent manufacturing.
- 99.99% High‑purity Grade: Strict impurity control, dedicated for semiconductors, photovoltaic and electronic functional materials, higher market price.
Storage & safety handling requirements
Elemental selenium powder is toxic; inhalation of dust or fumes will cause human body poisoning. Please strictly comply with the following requirements：
- Store in cool, dry, ventilated warehouse, keep packages tightly sealed, prevent dust scattering. Keep away from oxidizing agents, strong acids and fire sources.
- Working site needs good dust‑extraction ventilation system. Operators shall wear dust respirator, chemical goggles and anti‑static rubber gloves. Avoid inhaling powder dust.
- Do not eat or drink in operation area. Wash hands thoroughly after handling products.
- Standard packing: 25kg iron drum with inner plastic bag, small‑size vacuum packaging available for high‑purity grades.
FAQ
Q1: Is selenium powder the same as selenium compounds? A1: No. Selenium powder is elemental selenium. Selenium compounds are chemical derivatives. They have different toxicity and application scope and cannot replace each other.
Q2: What risk will occur when selenium powder is heated? A2: Under high‑temperature condition, selenium powder will generate poisonous selenium‑containing vapor. High‑temperature processing must be operated under complete ventilation facilities.
Q3: Will particle size influence glass coloring performance? A3: Yes. Finer powder contributes to better dispersion effect inside glass melt. Custom particle size can be supplied according to customer technical requirements.
Q4: Can you provide MSDS and COA documents for each batch? A4: Yes. Every shipment is attached with Certificate of Analysis and MSDS safety data sheet.