Sodium Hydrosulfite

Chemical Identification

• Product Name: Sodium Hydrosulfite

• Synonym: Sodium Dithionite

• Chemical Formula: Na₂S₂O₄

• CAS Number: 7775-14-6

• EC Number: 231-890-0

• Appearance: White to off-white crystalline powder

• Solubility: Soluble in water (decomposes in solution)

  
  

Key Properties

• Strong reducing capability

• Rapid decolorization and bleaching performance

• Effective under alkaline conditions

• Decomposes when exposed to moisture, heat, or air

• Suitable for controlled industrial processes

These characteristics make Sodium Hydrosulfite an essential chemical for reduction-based applications.

Applications

Sodium Hydrosulfite is widely used across multiple industries:

• Textile Industry
  Used for vat dye reduction, stripping, and color correction.

• Paper & Pulp Industry
  Applied in pulp bleaching to improve brightness.

• Water Treatment
  Used as a reducing agent to remove residual chlorine and other oxidants.

• Chemical Manufacturing
  Employed in reduction reactions and purification processes.

• Mineral Processing
  Used for decolorization and beneficiation processes.

Packaging & Storage

• Supplied in 25 kg drums, bags, or customized packaging

• Store in a cool, dry, and well-ventilated area

• Keep containers tightly sealed and protected from moisture

• Avoid contact with air, heat, acids, and oxidizing agents

Safety & Handling

• Decomposes in contact with moisture and heat

• Use appropriate personal protective equipment (PPE)

• Avoid dust formation and inhalation

• For industrial and professional use only

Frequently Asked Questions (FAQs)

What is Sodium Hydrosulfite used for?

It is mainly used as a reducing agent in textiles, paper bleaching, water treatment, and chemical processing.

Is Sodium Hydrosulfite the same as Sodium Dithionite?

Yes. Sodium Hydrosulfite and Sodium Dithionite refer to the same chemical compound.

Is Sodium Hydrosulfite water soluble?

It dissolves in water but decomposes, so solutions should be prepared fresh and used promptly.

How should Sodium Hydrosulfite be stored?

It should be stored in sealed containers, in a dry and cool environment, away from moisture and oxidizing agents.

Can Sodium Hydrosulfite be used in water treatment?

Yes. It is commonly used to remove residual chlorine and other oxidizing substances.

Is Sodium Hydrosulfite suitable for export?

Yes. It is widely exported with compliant packaging, labeling, and documentation.

Why Choose Us

• Stable and consistent product quality

• Reliable supply for industrial-scale demand

• Export-oriented packaging solutions

• Experience in sulfur-based chemicals

Contact Us

For specifications, pricing, or technical inquiries, please contact us:

Email: lisa@aozunchem.com
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We look forward to supporting your Sodium Hydrosulfite (CAS 7775-14-6) sourcing requirements.