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Sodium Hydrosulphite
Original price was: $ 3.05.$ 2.94Current price is: $ 2.94.
Sodium Hydrosulphite, also known as sodium dithionite, is a white to yellowish powder with a strong reducing property. It is highly soluble in water and decomposes readily, releasing sulfur dioxide and sulfites. Widely used as a powerful reducing agent and bleaching agent, it finds applications in textile processing, paper and pulp industries, water treatment, and chemical manufacturing. Its ability to break down colored compounds makes it ideal for decolorization and cleaning processes.
Sodium Hydrosulphite
Primary Uses
- Textile Industry
- Used as a reducing agent in the vat dyeing process and for bleaching fabrics.
- Removes excess dye and helps in color correction of textiles.
- Paper and Pulp Industry
- Employed in deinking recycled paper to remove inks and contaminants.
- Acts as a bleaching agent to brighten paper products.
- Water Treatment
- Utilized for the removal of chlorine and chloramines from water, protecting aquatic life and equipment.
- Reduces harmful oxidizing agents in wastewater treatment.
- Leather Industry
- Used in the deliming process and to bleach hides and skins during leather manufacturing.
- Chemical Manufacturing
- Serves as a reducing agent in the synthesis of various chemicals, including dyes and pharmaceuticals.
Secondary Uses
- Photography
- Used as a reducing agent in photographic developers to control image development.
- Metal Treatment
- Employed for removing surface oxides and scales during metal finishing and cleaning.
- Food Industry
- Used as a bleaching agent in some food processing applications under regulated conditions.
1. Basic Identification Attributes
- Chemical Name (IUPAC): Sodium dithionite
- Common/Trade Name: Sodium Hydrosulphite
- CAS Number: 7775-14-6
- HS Code: 2832.30
- Synonyms: Sodium dithionite, Sodium hydrosulfite
2. Physical & Chemical Properties
- Physical State: Powder or granules
- Color & Odor: White to pale yellow; sulfurous odor
- Solubility: Soluble in water, decomposes on contact with moisture and acids
- pH: Alkaline in solution (~10-11)
- Density: Approx. 1.4 g/cm³
3. Safety & Hazard Attributes
- GHS Classification: Oxidizing solid (self-reactive); harmful if swallowed or inhaled; causes skin and eye irritation
- Toxicity: Can release toxic sulfur dioxide gas upon decomposition
- Exposure Limits: Use appropriate industrial hygiene measures
4. Storage & Handling Attributes
- Storage Conditions: Store in a cool, dry, well-ventilated area away from moisture, acids, and oxidizing agents
- Container Type: Supplied in moisture-proof bags or drums
- Shelf Life: Limited; sensitive to moisture and air
- Handling Precautions: Avoid dust formation, inhalation, and contact with skin and eyes
- Storage Measures: Keep containers tightly closed and stored in a dry environment
5. Regulatory & Compliance Attributes
- Complies with industrial chemical regulations including OSHA, REACH, and local hazardous material standards
- Proper labeling and handling as per transport and safety guidelines
6. Environmental & Health Impact
- Biodegradability: Breaks down in environment; sulfur compounds may cause localized effects
- Ecotoxicity: Toxic to aquatic life in high concentrations; avoid release into waterways
- Bioaccumulation: Not expected
Safety Handling Precautions
- PPE Required: Gloves, goggles, dust mask or respirator, protective clothing
- Handling Guidelines: Use in well-ventilated areas; avoid inhalation of dust and contact with skin or eyes
- Storage Measures: Store away from moisture and incompatible substances to prevent hazardous decomposition
First Aid Measures
- Inhalation: Move to fresh air immediately; seek medical attention if symptoms persist
- Skin Contact: Wash affected area with plenty of water; remove contaminated clothing
- Eye Contact: Flush eyes thoroughly with water for at least 15 minutes; seek medical attention
- Ingestion: Do not induce vomiting; rinse mouth and seek immediate medical help
Firefighting Measures
- Fire Hazards: May decompose explosively when heated or in contact with acids and moisture
- Extinguishing Media: Use dry chemical powder, CO₂, or foam; avoid water as it may accelerate decomposition
- Special Precautions: Wear full protective gear and self-contained breathing apparatus
- Hazardous Combustion Products: Sulfur dioxide, sulfur oxides, sodium oxides
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