Sulfur Dioxide
Sulfur Dioxide
Formula: SO2
Sulfur Dioxide (SO2) is a colorless, toxic gas with a sharp odor, widely used in chemical manufacturing, food processing, and industrial applications. It is a key intermediate in the production of sulfuric acid and acts as both a reducing agent and preservative in various processes.
In controlled environments, sulfur dioxide is used for chemical synthesis, bleaching, and preservation, as well as in semiconductor and specialty processing applications where controlled reactivity is required.
Applications include:
- Intermediate in the production of sulfuric acid and other sulfur-based chemicals.
- Used as a reducing agent and preservative in food and beverage processing.
- Applied in bleaching and pulp and paper manufacturing processes.
- Used in semiconductor and specialty chemical processing applications.
- Applied in environmental monitoring and calibration gas mixtures.
Material Compatibility
Sulfur dioxide forms sulfurous acid in the presence of moisture, leading to corrosion of metals and degradation of system components. Compatibility depends on maintaining dry conditions and selecting materials suitable for acidic environments where exposure cannot be avoided.
EFC Gases & Advanced Materials supplies high-purity sulfur dioxide with tight control of moisture and critical impurities to ensure consistent performance in demanding applications.
Applications
Specifications
Further Specifications
Cylinder Sizes
- Produce sulfuric acid and sulfur chemicals.
- Preserve and process food products.
- Bleach pulp and paper materials.
- Support semiconductor and chemical processing.
- Use in environmental monitoring systems.
| Grade 3.8 | Grade 4.0 | |
|---|---|---|
| Purity | 99.98% | 99.99% |
| N2 | 140 ppmv | 140 ppmv |
| CO2 | 50 ppmv | 50 ppmv |
| Water | 10 ppmv | 10 ppmv |
| CHEMICAL & PHYSICAL PROPERTIES | |
|---|---|
| Molecular Weight | 64.07 |
| Specific Volume | 5.9 cu. ft/lb |
| Pressure @ 70° F | 50 psig |
| Valve Outlet | CGA 660 |
| Cylinder Size | Fill Volume (lb) |
|---|---|
| 55L/Size 150LP | 150 |
| 44L/Size 200 | 100 |
| 16L/Size 80 | 40 |
Moisture level guaranteed only when EFC Gases & Advanced Materials prepares the cylinders.
All concentrations are on a mol/mol basis unless otherwise stated.
