Sodium Selenite

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Sodium Selenite is an inorganic selenium compound with the formula Na₂SeO₃. In its commercial 45% concentration, it is typically supplied as a colorless to slightly yellow aqueous solution or as a crystalline solid with 45% selenium content. It is primarily used as a micronutrient additive in animal nutrition, a reagent in the pharmaceutical and glass industries, and in various research applications. Highly bioavailable, it serves as a key selenium source where controlled selenium supplementation is critical. This 25kg product offers precise dosing, stability, and ease of handling in industrial and agricultural settings.

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Categories: Animal Feed Additives, Nutrient Supplements Tags: Agricultural use, Inorganic Selenium Compound, Na₂SeO₃, Nutraceuticals, Pharmaceutical ingredient, Sodium Selenite

Description

Table of Contents

Sodium Selenite

Primary Uses

Animal Nutrition

Feed Additive for Livestock: Provides essential selenium in poultry, swine, and cattle feed formulations.
Pet Food Fortification: Supplies trace selenium in dog and cat food.
Aquaculture Feed: Maintains optimal selenium levels in fish and shrimp diets.
Premix Manufacturing: Used in vitamin-mineral premixes for commercial feed production.

Pharmaceutical & Nutraceutical Industry

Dietary Supplements: Source of selenium in tablets, capsules, and liquid formulations.
Parenteral Nutrition: Occasionally used in injectable selenium preparations under medical supervision.
Topical Formulations (Antifungal/Skin health): Included in certain dermatological preparations for its antimicrobial properties.

Glass & Ceramics Industry

Glass Manufacturing: Acts as a decolorizing agent to neutralize green tints caused by iron.
Red-Colored Glass Production: Imparts pink or red coloration in specialty glass and enamels.

Chemical & Industrial Applications

Metal Alloy Additive: Used in specialty steels and brasses for improved machinability.
Electronics & Semiconductors: Occasionally used in selenium-containing compounds for photovoltaic or rectifier applications.
Pigments & Dyes: Trace amounts used in certain inorganic pigment formulations.

Secondary Uses

Water Treatment & Environmental Applications

Nutrient Additive in Bioremediation: Supports microbial activity in selenium-deficient remediation environments.
Trace Element Balancing in Hydroponics: Occasionally used to supplement selenium in nutrient solutions.

Laboratory & Research

Cell Culture & Biotech Research: Essential trace element in media for mammalian and microbial cultures.
Analytical Chemistry Reagent: Employed in certain redox titrations or as a selenium standard.
Toxicology & Nutrition Studies: Used in controlled studies on selenium metabolism and deficiency.

Agriculture (Plant Nutrition)

Soil Fertilizer (Micro-dose Application): In selenium-deficient regions, applied in trace amounts to increase plant selenium uptake.
Foliar Application (Very limited): Applied in diluted form to crops to enrich selenium content for human/animal consumption.

Veterinary & Animal Health

Injectable Selenium-Vitamin E Therapy: Used under veterinary supervision for selenium-responsive disorders (e.g., white muscle disease).
Mineral Licks & Blocks: Incorporated into solid supplements for grazing animals.

KEY PRODUCT FEATURES

1. Basic Identification Attributes

Chemical Name (IUPAC): Disodium selenite
Common/Trade Name: Sodium Selenite
CAS Number: 10102-18-8
HS Code: 2842.90.00
Synonyms: Disodium selenite, Sodium salt of selenious acid

2. Physical & Chemical Properties

Physical State: Typically an aqueous solution or crystalline powder
Color & Odor: Colorless to pale yellow; odorless
Concentration: 45% active Sodium Selenite by weight (in solution)
Solubility: Freely soluble in water
Density (solution): ~1.45–1.50 g/cm³
pH (solution): 8.0–9.5
Molecular Weight: 172.94 g/mol (anhydrous Na₂SeO₃)

3. Safety & Hazard Attributes

GHS Classification: Acute Toxicity Oral (Category 2), Aquatic Acute (Category 1), Aquatic Chronic (Category 1)
Toxicity: LD₅₀ (oral, rat) ≈ 3.9 mg/kg
Exposure Limits: OSHA PEL: 0.2 mg Se/m³ (as selenium)
Carcinogenicity: Not classifiable (IARC Group 3); regulated due to narrow margin between essentiality and toxicity

4. Storage & Handling Attributes

Storage Conditions: Store in a cool, dry, well-ventilated area; keep container tightly closed
Container Type: 25kg HDPE drums, IBCs, or lined steel drums for bulk liquid
Shelf Life: 12–24 months under recommended conditions
Handling Precautions: Avoid skin and eye contact; minimize aerosol or mist formation

5. Regulatory & Compliance Attributes

REACH Registered
Complies with:
- EU Feed Additive Register (EC No. 1831/2003)
- US FDA regulations (21 CFR 573.920 – Selenium in animal feeds)
- USP Grade Available (for pharma/nutraceutical use)
UN Number: Not classified as a dangerous good for transport in solution
TSCA Listed

6. Environmental & Health Impact

Biodegradability: Inorganic compound; not biodegradable
Ecotoxicity: Highly toxic to aquatic life
Bioaccumulation: Potential in aquatic organisms; requires controlled disposal
Soil Impact: Persistent in soil if not managed; risk of phytotoxicity at high concentrations

SAFETY HANDLING PRECAUTIONS

Safety Handling Precautions

PPE Required: Chemical-resistant gloves, safety goggles, lab coat, and dust or mist mask (as applicable)
Handling Guidelines: Use only in well-ventilated areas; avoid spills into environment
Storage Measures: Keep away from strong acids, oxidizers, and incompatible metals

First Aid Measures

Inhalation: Move to fresh air immediately; seek medical attention if symptoms occur
Skin Contact: Rinse with water and remove contaminated clothing
Eye Contact: Flush eyes with water for at least 15 minutes; seek medical advice
Ingestion: Rinse mouth; do NOT induce vomiting; seek urgent medical attention

Firefighting Measures

Fire Hazards: Not flammable; may decompose at high temperatures producing toxic selenium fumes
Extinguishing Media: Water spray, CO₂, dry chemical
Hazardous Combustion Products: Selenium oxides, toxic fumes