Sulfurous acid
Properties
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General |
| Name |
Sulfurous acid |
| Chemical formula |
H2SO3 |
| Appearance |
Clear, colorless solution with a sulfurous odor. |
Physical |
| Formula weight |
82.07 amu |
| Density |
1.03 ×103 kg/m3 (in aqueous solution) |
| Solubility |
Very soluble |
Safety |
| Ingestion |
Severe and permanent damage may result. |
| Inhalation |
Causes irritation of the respiratory tract |
| Skin |
Causes burns. |
| Eyes |
Causes burns. |
| More info |
Hazardous Chemical Database |
SI units were used where possible. Unless otherwise stated, standard conditions were used.
Disclaimer and references
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Sulfurous acid (British English: Sulphurous), also known as sulfur dioxide solution, H2SO3, is a mineral acid (not an organic acid), formed when sulfur dioxide dissolves in water. It is a strong reducing agent, and is used to bleach materials that may be damaged by chlorine. In the atmosphere, sulfurous acid may form when sulfur dioxide dissolves in rain drops, causing acid rain.
The compound is only known in aqueous solution and is not isolated in its pure state.
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