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Sulfur dioxide (SO2)
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Basic info:
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English name
Sulphur dioxide
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CAS
7446-09-5
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Hazard info
1079
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Transport
"ADR Class 2, 2TC"
Properties:
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Molar mass
64.065
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Gas density at 15°С/1,013 bar
2.759
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Boiling point at 1,013 bar
-10.02
Options
- single-piece
50 l (200) — 200 bar
- Cylinder 50 l (CGA330 SS) CGA330 SS
Specs
| Sulfur dioxide 3.0 | ||
|---|---|---|
| Composition | ||
| SO2 | % | ≥99,9% |
| Admixture | ||
| H2O | ppmv | <600 |
| As | ppmv | <400 |
| Residue | ppmv | <0,04 |
Sulfur dioxide, sulphurous anhydride, dioxide of sulfur or sulfur dioxide gas is a common chemical compound of sulfur and oxygen. The substance is highly soluble in organic (water, ethanol) and inorganic (sulfuric acid) solvents. Sulfur dioxide can be produced intentionally by burning sulfur or roasting sulfides.
Sulfur dioxide is harmful to human health and the environment.
Sulfur dioxide actively interacts with substances that react with oxygen (oxidize). Sulfur dioxide is a toxic, non-flammable compound. Substance containers may explode. If liquid gas leaks from a cylinder, it may generate smoke as it quickly transforms into gas. It can spread along the surface of the Earth, and also can accumulate in low levels of the land surface: depressions, tunnels, basements.Sulfur dioxide is not completely soluble in water. When reacting with water it turns into poisonous sulfurous acid. Above the water surface, sulfur dioxide forms an asphyxiating gas. It is an atmosphere pollutant.
- Colorless gas
- With a characteristic smell (burning matches)
- Tasteless
- Highly toxic
- Non-flammable
- Heavier than air
Pure sulfur dioxide has various applications: both in industry and agriculture.
- Sulfur dioxide is used as a component for the production of sulfurous acid, in laboratories as a solvent;
- Sulfur dioxide has significant disinfectant properties, so it is often used to combat various parasites of bacterial or fungal nature. This chemical compound is used to treat warehouses with agricultural products, wine barrels, and basement premises.
- Sulfur dioxide is also used in the food industry as a preservative and antimicrobial agent.
Oil and Gas 
Chemical industry 
Power industry 
Agriculture 
Car industry 
Medicine 
Food industry 
Nanotechnologies 
Metallurgy Sulfur dioxide belongs to hazard class 2.2. It is a non-flammable, highly toxic gas. Toxicity hazard class 3. Under normal temperature conditions, it does not explode, but the likelihood of an explosion increases when heated.
Sulfurous gas can be transported by land transport - by car, rail, or water. Special containers (cylinders or barrels) made of steel with high carbon content are required for transportation.
Can be transported by
- train
- truck
- ship