Flag of the United StatesAmerican Chemical Independence

Sodium metabisulfite

CAS 7681-57-4

U.S. production volumes are classified as confidential business information.

Molecular structure of 7681-57-4
2 Na⁺
US productionCBI
Import value, 2024$30M
Top sourceItaly 45%

At least one company claimed its 2023 production or import volume for this chemical as confidential, so EPA withholds it.

Why supply is unknown

Production is reported production, not a complete census of factories. US production volume is confidential. 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 283210 · narrow

EPA reports by year
2023
US production Confidential · Imports Confidential
2019
US production Confidential · Imports Confidential

These shares come from HS customs code 283210, which covers 2 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
IT 45%ItalyCA 17%CanadaIN 11%IndiaMY 7%MalaysiaVN 6%Vietnam
EPA-registered manufacturers (3)
Syensqo Sa · BE Belgium
Nalco- An Ecolab
Solvay
Domestic parents -- activity not disclosed (3)
Ineos Enterprise Us Hold
Polyventive
Valudor Products
EPA-registered importers (16)
Basf Se · DE Germany
Northern Star Resources · AU Australia
Teck Resources · CA Canada
Basf
Brenntag
Show all 16
Cascade Columbia
Chemical Distribution Network
Esseco Usa
Global Chemical Resources
Niche Chem Industries
Northern Star (Pogo)
Quadra Chemicals
Teck American Incorporated
Thatcher
Wilbur-Ellis Holdings Ii
Wintersun International

Why It Matters

Sectors
HealthAgricultureFoodWaterTransportationMetals & MiningPlastics & RubberTextilesConsumer ProductsPaper & PrintingCore Chemicals
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 14 sectors as 12 functional roles.

  • •Surfactant (surface active agent) in All Other Basic Organic Chemical Manufacturing (15%)Processing as a reactant
  • •Reducing agent in Services (20%)Processing as a reactant
  • •Preservative in Food, beverage, and tobacco product manufacturing (50%)Processing—incorporation into formulation, mixture, or reaction product
  • •Reducing agent in Mining (except Oil and Gas) and support activities (5%)Processing as a reactant
  • •Intermediate in Pharmaceutical and Medicine Manufacturing (5%)Processing as a reactant
  • •Chemical reaction regulator in Organic Fiber Manufacturing (5%)Processing as a reactant
  • •Flotation agent in Mining (except Oil and Gas) and support activities (100%)Processing—incorporation into formulation, mixture, or reaction product
  • •Oxidizing agent in Textiles, apparel, and leather manufacturingProcessing—incorporation into formulation, mixture, or reaction product
  • •Etching agent in Primary Metal ManufacturingUse—non-incorporative activities
  • •Dye in All Other Chemical Product and Preparation ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
  • •Intermediate in All Other Basic Organic Chemical Manufacturing (100%)Processing as a reactant
  • •Reducing agent in Utilities (10%)Processing as a reactant
  • •Reducing agent in Food, beverage, and tobacco product manufacturing (50%)Processing—incorporation into formulation, mixture, or reaction product
  • •Reducing agent in Textiles, apparel, and leather manufacturing (10%)Use—non-incorporative activities
  • •Reducing agent in All Other Chemical Product and Preparation Manufacturing (30%)Processing as a reactant
  • •Anti-scaling agent in Transportation Equipment Manufacturing (1%)Use—non-incorporative activities
  • •Anti-scaling agent in Services (1%)Use—non-incorporative activities
  • •Anti-scaling agent in Food, beverage, and tobacco product manufacturing (1%)Use—non-incorporative activities
  • •Anti-scaling agent in Plastics Product Manufacturing (1%)Use—non-incorporative activities
  • •Anti-scaling agent in All Other Basic Inorganic Chemical Manufacturing (3%)Use—non-incorporative activities
  • •Anti-scaling agent in Primary Metal Manufacturing (3%)Use—non-incorporative activities
  • •Anti-scaling agent in Paper Manufacturing (12%)Use—non-incorporative activities
  • •Anti-scaling agent in Utilities (83%)Use—non-incorporative activities
  • •Anti-scaling agent in All Other Chemical Product and Preparation Manufacturing (100%)Processing as a reactant
  • •Oxidizing agent in Mining (except Oil and Gas) and support activities (100%)Processing as a reactant
  • •Leaching agent in Mining (except Oil and Gas) and support activitiesProcessing—incorporation into formulation, mixture, or reaction product
  • •Antioxidant in Food, beverage, and tobacco product manufacturing (50%)Processing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS7681-57-4
PubChem CID656671
DTXSIDDTXSID0029684
FormulaNa2O5S2
Mol. Weight190.11 g/mol
SMILES[O-]S(=O)S(=O)(=O)[O-].[Na+].[Na+]

Data Sources

← Back to Dashboard← Back to Health

Brief citations

Sodium metabisulfite (CAS 7681-57-4) https://chemicalindependence.com/chemical/7681-57-4/ EPA CompTox (DSSTox): DTXSID0029684. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID0029684 PubChem: 656671. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/656671 EPA Chemical Data Reporting: 7681-57-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 7681-57-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 283210 for CAS 7681-57-4. Reporting year: 2024. https://usatrade.census.gov/