Sodium sulfite
CAS 7757-83-7
U.S. production volumes are classified as confidential business information.
US productionCBI
Confidential Business Information. The EPA withholds this volume because publishing it could reveal the reporting company's trade secrets.
Top sourceNo public record
At least one company claimed its 2023 production or import volume for this chemical as confidential, so EPA withholds it.
Why supply is unknownProduction is reported production, not a complete census of factories. US production volume is confidential. Production reporting year: 2023.
Where It Comes From
EPA reports by year
- 2023
- US production Confidential · Imports Confidential
- 2019
- US production Confidential · Imports Confidential
EPA-registered manufacturers (10)
Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.
Karta Halten B V · NL Netherlands
3M
Chevron Richmond California Refinery
Drilling Specialties
Ecovyst
Show all 10
Hydrite Chemical
Nalco- An Ecolab
Pvs Dx
Resolute Forest Products
Southern Ionics
Domestic parents -- activity not disclosed (6)
EPA records name a US company for this chemical but do not disclose whether the company made it here or imported it.
Ineos Enterprise Us Hold
Polyventive
Quadra Chemicals
Surpass Chemical
Westco Chemicals
Show all 6
Wintersun International
EPA-registered importers (9)
Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.
Basf Se · DE Germany
Agfa
Basf
Chemical Distribution Network
Denka Performance Elastomer
Show all 9
Esseco Usa
Global Chemical Resources
Independent Chemical
Wilbur-Ellis Holdings Ii
Why It Matters
Sectors
FoodEnergyWaterMetals & MiningPlastics & RubberTextilesConsumer ProductsPaper & PrintingCore Chemicals
Downstream UsesNot recorded
FDA Shortage Status
Whether any manufacturer currently reports this drug as in shortage on the FDA Drug Shortages database. "Active Shortage" means at least one presentation has status "current."
No FDA shortage records
Industrial Uses
Used in 16 sectors as 12 functional roles.
- •Reducing agent in Oil and Gas Drilling, Extraction, and Support activities (5%)Processing—incorporation into formulation, mixture, or reaction product
- •Corrosion inhibitor in All Other Chemical Product and Preparation Manufacturing (20%)Processing—incorporation into formulation, mixture, or reaction product
- •Reducing agent in Services (10%)Processing as a reactant
- •Corrosion inhibitor in Utilities (10%)Processing—incorporation into formulation, mixture, or reaction product
- •Reducing agent in Mining (except Oil and Gas) and support activities (10%)Processing as a reactant
- •Surfactant (surface active agent) in All Other Basic Organic Chemical Manufacturing (20%)Processing as a reactant
- •Preservative in Food, beverage, and tobacco product manufacturing (25%)Processing—incorporation into formulation, mixture, or reaction product
- •Intermediate in All Other Basic Inorganic Chemical Manufacturing (100%)Processing as a reactant
- •Reducing agent in Utilities (10%)Processing as a reactant
- •Reducing agent in Petroleum Lubricating Oil and Grease Manufacturing (20%)Processing as a reactant
- •Reducing agent in Soap, Cleaning Compound, and Toilet Preparation Manufacturing (0%)Use—non-incorporative activities
- •Processing aids, specific to petroleum production in Oil and Gas Drilling, Extraction, and Support activities (0%)Processing as a reactant
- •Reducing agent in All Other Basic Inorganic Chemical Manufacturing (20%)Use—non-incorporative activities
- •Solids separation (precipitating) agent, not otherwise specified in Services (0%)Processing—repackaging
- •Reducing agent in Paper Manufacturing (0%)Use—non-incorporative activities
- •Chemical reaction regulator in Synthetic Rubber Manufacturing (100%)Processing as a reactant
- •Reducing agent in All Other Chemical Product and Preparation Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
- •Reducing agent in Plastics Material and Resin Manufacturing (0%)Processing as a reactant
- •Anti-scaling agent in Paper Manufacturing (100%)Processing as a reactant
- •Fixing agent (mordant) in Photographic Film, Paper, Plate, and Chemical Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
- •Bleaching agent in Textiles, apparel, and leather manufacturing (50%)Processing—incorporation into formulation, mixture, or reaction product
- •Intermediate in Petroleum Refineries (10%)Processing as a reactant
- •Intermediate in All Other Basic Organic Chemical ManufacturingProcessing as a reactant
- •Absorbent in Textiles, apparel, and leather manufacturing (95%)Processing—incorporation into article
- •Absorbent in Mining (except Oil and Gas) and support activities (5%)Processing—incorporation into article
Chemical Identity
CAS7757-83-7
PubChem CID24437
DTXSIDDTXSID2044260
FormulaNa2O3S
Mol. Weight126.05 g/mol
SMILES[O-]S(=O)[O-].[Na+].[Na+]
Data Sources
- EPA CompTox (DSSTox) · DTXSID2044260Retrieved 2026-04-06
- PubChem · compound 24437Retrieved 2026-04-06
- EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
- EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
Brief citations
Sodium sulfite (CAS 7757-83-7) https://chemicalindependence.com/chemical/7757-83-7/ EPA CompTox (DSSTox): DTXSID2044260. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID2044260 PubChem: 24437. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/24437 EPA Chemical Data Reporting: 7757-83-7. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 7757-83-7. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting