| Customization: | Available |
|---|---|
| CAS No.: | 7446-09-5 |
| Formula: | So2 |
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Sulfur dioxide (also sulphur dioxide) is the chemical compound with the formula SO2. It is a poisonous gas with a pungent, irritating smell, that is released by volcanoes and in various industrial processes. Since coal and petroleum often contain sulfur compounds, their combustion generates sulfur dioxide unless the sulfur compounds are removed before burning the fuel. Further oxidation of SO2, usually in the presence of a catalyst such as NO2, forms H2SO4, and thus acid rain.[2] Sulfur dioxide emissions are also a precursor to particulates in the atmosphere. Both of these impacts are cause for concern over the environmental impact of these fuels.
Products specification:
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Specifications |
Special grade |
Grade A |
|
SO2 content ≥% |
99.97 |
99.90 |
|
Residue content ≤% |
0.010 |
0.040 |
|
Moisture content ≤% |
0.020 |
0.060 |
|
Arsenic(As) content ≤% |
0.000004 |
0.0001 |
|
Color (as liquid) |
Water White |
Water White |
|
Color (as gas) |
Colorless |
Colorless |
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Standard No. |
GB3637-93 |
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Shipping and Storage
Liquid SO2 can be shipped in a number of different ways. Small quantities are available in 68 kg (150 lb) cylinders similar to cylinders for welding gases. The rate of delivery will depend in the temperature of the liquid SO2 in the cylinder. The overall rate of SO2 gas discharge will depend on the heat transfer rate from the surroundings through the walls of the cylinder. At room temperature a discharge rate of about 0.9 kg/h (2.0 lb/h) of gaseous SO2 is possible.
Larger quantities of liquid SO2 are available in one tonne containers.
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Purity
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99.9%
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Application
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1. Preservative reducing agent
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UN
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UN1079
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2. Precursor to sulfuric acid
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CAS
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7446-09-5
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3. As a refrigerant
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EINECS
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231-195-2
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Specification
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99.9%
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≥99.9999%
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Ethylene
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<50 ppm
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<0.1 ppm
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Oxygen
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<5 ppm
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<0.1 ppm
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Nitrogen
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<10 ppm
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<0.1 ppm
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Methane
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<300 ppm
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<0.4 ppm
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Propane
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<500 ppm
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<0.2 ppm
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Moisture(H2O)
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<50 ppm
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<1ppm
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