Sodium Dithionite ( Hydrosulfite )

Sodium dithionate (III) 
Other Names: Disodium dithionite, Sodium hyposulfite

CAS Number: 7775-14-6
Sum Formula: Na₂S₂O₄
Molar Mass: 174.11 g/mol
Appearance: White to slightly yellow crystalline powder

Sodium dithionate (III) is an inorganic reducing agent used in various chemical processes. It is primarily applied in industrial and analytical settings for its strong reduction properties and solubility in water.

Applications

Industrial Chemistry: Used in dyeing and bleaching processes, especially in the textile and paper industries.

Analytical Chemistry: Employed as a reducing agent in redox titrations and in procedures requiring selective reduction of metal ions.

Technical Uses: Used in wastewater treatment and decolorization of industrial effluents.

Safety
Signal Word: Danger

Hazard Statements
H251: Self-heating; may catch fire.
H302: Harmful if swallowed.
H319: Causes serious eye irritation.

Precautionary Statements
P235: Keep cool.
P264: Wash skin thoroughly after handling.
P280: Wear protective gloves/ protective clothing/ eye protection/ face protection.
P301+P312: IF SWALLOWED: Call a POISON CENTER/ doctor if you feel unwell.
P305+P351+P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P337+P313: If eye irritation persists: Get medical advice/ attention.

First Aid Measures
Eye Contact: Immediately rinse with plenty of water. Remove contact lenses if present. Seek medical attention if irritation continues.
Skin Contact: Wash thoroughly with soap and water.
Inhalation: Move to fresh air. Seek medical attention if symptoms occur.
Ingestion: Rinse mouth. Do not induce vomiting. Seek medical help if unwell.

Handling and Storage
Storage Conditions: Store in a cool, dry, and well-ventilated area. Protect from heat and direct sunlight.
Handling Precautions: Avoid contact with incompatible substances such as strong oxidizers and acids. Use appropriate PPE to minimize exposure.