Overview
Nano selenium powder consists of selenium particles with sizes ranging from nanometers to micrometers. It is produced through physical or chemical methods such as laser ablation, chemical reduction, or ball milling. Due to its small particle size, it exhibits unique properties like high surface area and enhanced reactivity compared to bulk selenium. This form of selenium is increasingly used in biomedical and agricultural applications due to its bioavailability and low toxicity. Its antioxidant properties make it valuable in dietary supplements and functional foods aimed at improving human and animal health.
Physical and Chemical Properties
Nano selenium powder typically appears as a red to gray-black powder, depending on particle size and purity. It has a high surface area, which enhances its chemical reactivity and biological activity. The powder is insoluble in water but can dissolve in concentrated sulfuric acid. Its melting point is 221°C, and it boils at 685°C. The density of selenium is 4.81 g/cm³, which is relatively high for a non-metal. These properties make it suitable for various industrial and biomedical applications where controlled release or high reactivity is required.
Main Applications
Nano selenium powder is widely used in dietary supplements due to its role as an essential trace element and antioxidant. It supports immune function and thyroid health in humans and animals. In agriculture, it is added to animal feed and fertilizers to prevent selenium deficiency in crops and livestock. Industrially, it serves as a catalyst in chemical reactions and in the production of glass and pigments. Its antibacterial properties also make it useful in medical devices and coatings. The versatility of nano selenium powder continues to drive research into new applications.
Safety and Storage
While nano selenium powder is generally considered safe at recommended doses, excessive exposure can be toxic. Inhalation or skin contact should be avoided, and personal protective equipment (PPE) such as gloves and masks should be used during handling. Storage requires a cool, dry environment away from light and moisture to prevent degradation. Containers should be tightly sealed to avoid contamination. Proper disposal methods should be followed to prevent environmental release.
B2B Procurement Guide
When procuring nano selenium powder, buyers should prioritize suppliers who provide detailed specifications, including particle size distribution, purity levels, and certificates of analysis. Reputable suppliers often offer batch testing reports to ensure consistency. Price varies based on purity (e.g., 99% or higher) and particle size (nanoscale commands a premium). Bulk purchases may qualify for discounts, but buyers should verify storage and handling capabilities before large-scale procurement. Quality assurance and regulatory compliance (e.g., FDA, REACH) are critical for biomedical and food-grade applications.