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Sodium Pyrosulfite ( metabisulfite ) metabisulphite Na2S2O5 - 100g

Sodium Pyrosulfite ( metabisulfite ) metabisulphite Na2S2O5 - 100g
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Vendor: SYNTHETIKA
Product code: 231141031
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Description

Sodium Pyrosulfite

Other Names: Sodium metabisulfite, disodium disulfite, sodium metabisulphite
CAS Number: 7681-57-4
Sum Formula: Na₂S₂O₅
Molar Mass: 190.10 g/mol
Appearance: White to slightly yellow crystalline powder with a pungent sulfur dioxide-like odor

Chemical and Physical Properties

  • Density: ~1.48 g/cm³

  • Melting Point: 150°C (decomposes)

  • Boiling Point: Not applicable (decomposes)

  • Solubility in Water: Highly soluble (65 g/100 mL at 20°C)

  • Solubility in Other Solvents: Slightly soluble in ethanol

  • Odor: Pungent, sulfur dioxide-like

Applications

  • Chemical Synthesis: Acts as a reducing agent and antioxidant in various chemical reactions

  • Water Treatment: Used to dechlorinate water and as an oxygen scavenger

  • Textile and Leather Industries: Employed in dyeing processes and leather treatment

  • Laboratory Use: Used to prepare solutions and reagents that require an anoxic or reducing environment

⚠️ This compound is not intended for pharmaceutical or food-related applications.

Safety

Signal Word: ⚠️ Warning

GHS Hazard Statements

H302 (98.9%): Harmful if swallowed [Warning Acute toxicity, oral]

H318 (99.5%): Causes serious eye damage [Danger Serious eye damage/eye irritation]

Precautionary Statement Codes

P264, P264+P265, P270, P280, P301+P317, P305+P354+P338, P317, P330, and P501

Handling and Storage

  • Storage Conditions: Keep container tightly closed in a dry, cool, well-ventilated area. Protect from moisture

  • Handling Precautions: Avoid dust formation. Use protective equipment. Ensure good ventilation in the working area

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