Sulfurous acid
Agent Name
Sulfurous acid
CAS Number
7782-99-2
Formula
H2-O3-S
Major Category
Toxic Gases & Vapors
Synonyms
Sulphurous acid; Schweflige saure [German]; Sulfur dioxide solution; [ChemIDplus] UN1833
Category
Acids, Inorganic
Description
Clear colorless liquid with a suffocating odor of sulfur dioxide; [Merck Index]
Sources/Uses
Used as a dental bleach, reducing agent, and antiseptic; [Merck Index] Permitted for use as an inert ingredient in non-food pesticide products; [EPA]
Comments
Aqueous solution of approximately 6% sulfur dioxide; Gradually oxidized by air forming sulfuric acid; Corrosive; [Merck Index] A strong oxidizing agent; Causes burns; [CAMEO] Human ingestion of 0.5 mg/kg causes diarrhea, other gastrointestinal changes, and nausea or vomiting; [RTECS] Causes burns; Harmful by inhalation; [Alfa Aesar MSDS] See "Sulfur dioxide" and "Sulfuric acid."
Biomedical References
Adverse Effects
Toxic Pneumonitis
Yes
Dermatotoxin
Skin burns
Diseases, Processes, and Activities Linked to This Agent
Processes
Industrial Processes with risk of exposure: