CAS 7446-09-5: Sulfur dioxide

Description: Sulfur dioxide (SO₂) is a colorless gas with a pungent, suffocating odor, commonly associated with volcanic eruptions and industrial processes. It is a significant atmospheric pollutant, primarily produced from the burning of fossil fuels and the smelting of metal ores. SO₂ is highly soluble in water, forming sulfurous acid (H₂SO₃), which contributes to acid rain. The gas is characterized by its ability to act as a reducing agent and is used in various applications, including as a preservative in food and beverages, a bleaching agent, and in the production of sulfuric acid. In terms of health effects, exposure to sulfur dioxide can irritate the respiratory system, leading to symptoms such as coughing and shortness of breath, particularly in individuals with pre-existing respiratory conditions. Environmental regulations often aim to limit SO₂ emissions due to its role in air pollution and its contribution to the formation of fine particulate matter. Overall, sulfur dioxide is a crucial compound in both environmental chemistry and industrial applications, necessitating careful management to mitigate its impacts.

Formula: O₂S

InChI: InChI=1S/O2S/c1-3-2

InChI key: InChIKey=RAHZWNYVWXNFOC-UHFFFAOYSA-N

SMILES: O=S=O

Synonyms:

• Oxosulfane oxide
• Sulfurous oxide
• Sulfur dioxide
• Sulfur dioxide [UN1079] [Poison gas]
• Sulfur oxide (SO2)
• sulfane, oxo-, oxide
• Sulfur dioxide (SO2)
• Sulfurous acid anhydride
• Sulfur superoxide
• Sulfurous anhydride
• SULFUR OXIDE
• Siarki dwutlenek
• 231-195-2
• Schwefeldioxyd

Sulfur Dioxide (ca. 8% in Tetrahydrofuran, ca. 1.2 mol/L)

CAS: 7446-09-5

• Formula: SO₂
• Color and Shape: Colorless to Almost colorless clear liquid
• Molecular weight: 64.06

Sulfur Dioxide (ca. 2.5% in Dichloromethane, ca. 0.5 mol/L)

CAS: 7446-09-5

• Formula: SO₂
• Color and Shape: Colorless to Almost colorlessclear liquid
• Molecular weight: 64.06