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Sulfurous acid

CAS 7782-99-2

Used in 1 industrial sector tracked by the EPA.

Molecular structure of 7782-99-2
US production51.1K lb
Import volumeZero
Import dependency0%
Top sourceNo public record

Production is reported production, not a complete census of factories. Production reporting year: 2023. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 281119 · basket

EPA reports by year
2023
US production 51.1K lb · Imports Zero
2019
US production 182.5M lb · Imports Zero

HS customs code 281119 covers 30 tracked chemicals in total. US Census does not break out this chemical's share, so the country-of-origin mix is not available. EPA CDR reports import dependency at the chemical level separately, shown above.

EPA-registered manufacturers (1)
Thatcher

Why It Matters

Sectors
Food
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Industrial Uses

  • •Reducing agent in Food, beverage, and tobacco product manufacturing (100%)Use—non-incorporative activities

Chemical Identity

CAS7782-99-2
PubChem CID1100
DTXSIDDTXSID7042435
FormulaH2O3S
Mol. Weight82.08 g/mol
SMILESOS(=O)O

Data Sources

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Brief citations

Sulfurous acid (CAS 7782-99-2) https://chemicalindependence.com/chemical/7782-99-2/ EPA CompTox (DSSTox): DTXSID7042435. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID7042435 PubChem: 1100. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/1100 EPA Chemical Data Reporting: 7782-99-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 7782-99-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting