Description

Sodium Selenite is an essential inorganic compound widely recognized for its role as a critical source of the trace element selenium. This high-purity material is vital for applications demanding precise selenium supplementation and controlled chemical reactivity. Key industries that rely on this product include animal nutrition, glass manufacturing, pharmaceuticals, and agricultural micronutrients. Its consistent quality and reliable supply make it a cornerstone for formulations where selenium content and purity are non-negotiable.

Application

• Animal Feed Additive: A primary source of selenium in vitamin-mineral premixes for livestock and poultry to prevent deficiency diseases and support immune function.
• Glass Manufacturing: Used as a decolorizing agent to neutralize the green tint caused by iron impurities, and as a colorant for producing red and pink glasses.
• Pharmaceutical & Nutritional Supplements: An active ingredient in tablet and capsule formulations for human selenium supplementation under strict pharmacopeial standards (e.g., USP).
• Agricultural Micronutrient: Incorporated into fertilizers and foliar sprays to correct selenium-deficient soils and improve crop nutritional value.
• Chemical Synthesis & Catalysis: Serves as a precursor and reagent in organic synthesis and in the preparation of other selenium compounds.
• Electroplating & Metallurgy: Used in electroplating baths and as an additive in metal alloys to enhance specific properties.

Basic Information

Product Name	Sodium Selenite
CAS No.	10102-18-8
Molecular Formula	Na2SeO3
Molecular Weight	172.94 g/mol
Synonyms	Selenious Acid, Disodium Salt; Disodium Selenite; Selenite de Sodium; Natriumselenit; Sodium Selenite (1:2); EINECS 233-267-9; Selenium Sodium Oxide
EINECS	233-267-9

Quality Control

Our Sodium Selenite is manufactured under a stringent quality management system. We offer various grades, including Technical, Feed Grade, and high-purity USP/EP grades for pharmaceutical applications. Each batch is tested to ensure compliance with relevant specifications for parameters such as assay, heavy metal content, and selenium concentration. A Certificate of Analysis (COA) documenting these results is provided with every shipment to guarantee traceability and product integrity.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials such as strong acids and reducing agents.

Specification

Item	Specification
Appearance	White crystalline powder
Identification (IR)	Conforms
Assay (as Na2SeO3)	≥ 98.0%
Selenium (Se) Content	≥ 45.0%
Loss on Drying	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Arsenic (As)	≤ 5 ppm
Water Insoluble Matter	≤ 0.5%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.