Sulfur Dioxide (SO 2 )

Sulfur Dioxide (SO 2 )
Sulfur Dioxide (SO 2 )
Sulfur Dioxide (SO 2 )
Sulfur Dioxide (SO 2 )
Sulfur Dioxide (SO 2 )
Sulfur Dioxide (SO 2 )
Sulfur Dioxide (SO 2 )
Sulfur Dioxide (SO 2 )
Sulfur Dioxide (SO 2 )
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Industrial Gas

Sulfur dioxide (SO2) is the most common and simplest sulfur oxide, with the chemical formula SO2. It is a colorless gas with an irritating and pungent odor. SO2 is soluble in water, ethyl alcohol, and ether. When dissolved in water, it forms sulfurous acid (H2SO3), which can be further oxidized to produce sulfuric acid efficiently.

Specifications
  • Chemical Formula: SO2
  • CAS No.: 7446-09-5
  • UN No.: 1079
  • EINECS No.: 231-195-2
  • Molecular Weight: 64.07 g/mol
  • Appearance: colorless, pungent odor
  • Melting Point: -75.5 ℃
  • Boiling Point: -10 ℃
  • Density: 2.9275kg/m³
  • Hazard Class (DOT): 2.3 & 8
  • Label: Toxic gas, corrosive gas
Applications

Sulphuric Acid Products
Mainly used to produce sulfur trioxide (SO3), sulfuric acid, sulfurous acid salts, and thiosulfates. It is also used as fumigants, preservatives, disinfectants, and reducing agents.

Food & Wine Preservatives
In China, sulfur dioxide is an approved bleaching agent. It bleaches food and strongly inhibits oxidase enzymes in plant-based foods. It is permitted in wines and fruit wines, with a maximum usage of 0.25g/kg and a residual limit of 0.05g/kg.

Refrigerants
Used as an organic solvent and refrigerant, and also in the refining of various lubricants.

Packaging
Gas Cylinder Specifications Contents
Cylinder Capacity Cylinder Valve Weight
40L QF-10 50kg
800L QF-10 1000kg
Industrial Grade Sulfur Dioxide (SO2) 99.9%
Purity 99.9%
Residue ≤ 0.04%
Moisture ≤ 0.06%
Arsenic ≤ 0.000004%
Electronic Grade Sulfur Dioxide (SO2) 99.999%
Purity 99.999%
Hydrogen (H2) ≤ 0.5ppm
Oxygen (O2) +Argon Gas (Ar) ≤ 1ppm
Nitrogen (N2) ≤ 4ppm
Methane (CH4) ≤ 0.5ppm
Carbon Monoxide (CO) ≤ 0.5ppm
Carbon Dioxide (CO2) ≤ 1ppm
Carbonyl Sulfide (COS) ≤ 1ppm
Carbon Disulfide (CS2) ≤ 1ppm
Hydrogen Sulfide (H2S) ≤ 0.5ppm
Ethylene (C2H4) ≤ 0.5ppm
Propane (CH3CH2CH3) ≤ 0.5ppm
N-Butane (C4H10) ≤ 0.5ppm
Iso-Butane (C4H10) ≤ 0.5ppm
Moisture ≤ 2ppm
Total Impurities ≤ 10ppm
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