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Wersje językowe
Producenci
Tiosiarczan sodu (tiosiarczan) - 1000
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Opis
Sodium Thiosulphate
Other Names: Thiosulfate, sodium hyposulfite
CAS Number: 7772-98-7
Sum Formula: Na₂S₂O₃
Molar Mass: 158.11 g/mol
Appearance: White, crystalline powder or colorless crystals
Chemical and Physical Properties
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Density: ~1.67 g/cm³
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Melting Point: 48.3°C (for pentahydrate, Na₂S₂O₃·5H₂O)
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Boiling Point: Decomposes before boiling
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Solubility in Water: Highly soluble (70 g/100 mL at 20°C for pentahydrate)
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Solubility in Other Solvents: Slightly soluble in ethanol
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Odor: Odorless
Applications
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Photographic Processing: Used in traditional photography as a fixer to dissolve unreacted silver halides
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Analytical Chemistry: Acts as a titrant in iodometric analysis
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Water Treatment: Dechlorinates tap water and neutralizes bleach
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Gold and Silver Recovery: Involved in leaching and refining processes
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Chemical Reagent: Used in laboratories for various redox reactions
⚠️ This compound is not intended for pharmaceutical or food-related applications.
Safety
GHS Hazard Statements
Not Classified
Handling and Storage
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Storage Conditions: Store in a cool, dry, well-ventilated area away from strong acids and oxidizing agents
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Handling Precautions: Avoid dust formation. Use appropriate protective equipment. Store tightly sealed to prevent moisture absorption
