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Pirosiarczyn sodu ( metabisiarczyn ) metabisiarczyn Na2S2O5 - 100g
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 metabisiarczyn Na2S2O5 - 100g "Pin It")
Opis
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
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Density: ~1.48 g/cm³
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Melting Point: 150°C (decomposes)
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Boiling Point: Not applicable (decomposes)
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Solubility in Water: Highly soluble (65 g/100 mL at 20°C)
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Solubility in Other Solvents: Slightly soluble in ethanol
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Odor: Pungent, sulfur dioxide-like
Applications
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Chemical Synthesis: Acts as a reducing agent and antioxidant in various chemical reactions
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Water Treatment: Used to dechlorinate water and as an oxygen scavenger
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Textile and Leather Industries: Employed in dyeing processes and leather treatment
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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
H302 (98.9%): Harmful if swallowed [Warning Acute toxicity, oral]
H318 (99.5%): Causes serious eye damage [Danger Serious eye damage/eye irritation]
P264, P264+P265, P270, P280, P301+P317, P305+P354+P338, P317, P330, and P501
Handling and Storage
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Storage Conditions: Keep container tightly closed in a dry, cool, well-ventilated area. Protect from moisture
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Handling Precautions: Avoid dust formation. Use protective equipment. Ensure good ventilation in the working area
