| Formula / Notation | H2SO3 |
|---|---|
| CAS Number | 7782-99-2 |
| Molecular Weight | 82.08 |
| Solubility | 558.5 mg/mL |
| Appearance | Sulfurous acid appears as a colorless liquid with a pungent burning sulfur odor. Corrosive to metals and tissue. |
| Also Known As | 7782-99-2; Sulphurous acid; Schweflige saure; H2SO3; EINECS 231-973-1; acide sulfureux; acido sulfuroso; schweflige Saeure; trioxosulfuric acid; dihydroxidooxidosulfur |
| Category | Acids |
What is Sulfurous acid?
Sulfurous acid is a sulfur oxoacid. It is a conjugate acid of a hydrogensulfite. It is a tautomer of a sulfonic acid.
Formula & Notation
IUPAC Name: sulfurous acid
Other Names / Synonyms: 7782-99-2; Sulphurous acid; Schweflige saure; H2SO3; EINECS 231-973-1; acide sulfureux; acido sulfuroso; schweflige Saeure; trioxosulfuric acid; dihydroxidooxidosulfur
Properties & Characteristics
Physical Data
| Property | Value |
|---|---|
| Molecular Weight | 82.08 |
| Solubility | 558.5 mg/mL |
| Appearance | Sulfurous acid appears as a colorless liquid with a pungent burning sulfur odor. Corrosive to metals and tissue. |
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Sulfurous acid is a sulfur oxoacid. It is a conjugate acid of a hydrogensulfite. It is a tautomer of a sulfonic acid.
Used in industrial chemical synthesis, fertilizer production, battery electrolytes, metal processing, and laboratory acid-base reactions.
Corrosive. Causes severe burns to skin, eyes, and respiratory tract. Wear appropriate PPE including gloves, goggles, and lab coat. Consult SDS before use.
The formula or notation for Sulfurous acid is: H2SO3