1.  Name:  Sodium Hyposulfite

2.  Molecular formula:   Na₂S₂O₄

3.  Molecular weight:   174.11

4.  Physical and Chemical property:   melting point >300   Ignition temperature 250℃ 

 Solubility: insoluble in ethanol, soluble in sodium hydroxide solution. Strong reaction and burning occur in water .

5. Specification:Industrial Grade 85-88

6.  Appearance:    White arenoid crystalline or light yellow powder

 

2. Storage and Transportation::  Stored in a cool, well-ventilated area. Relative humidity keep below 75%.  mixed with no oxidant, acids, combustible, edible chemicals etc. Transit should prevent insolation, rain and high temperature. in the stopover it should be protected from direct sunlight, heat. Transportation vehicles, ships must be dry, and have good rainproof facilities.

3. Usage:   used in printing industry, medicine, dressing and thiourea and sulfides synthesis, etc

4. Production technology   COONa + 2SO₂ + NaOH== Na₂S₂O₄ + CO₂ +H₂O

 

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