Sodium bisulfite
Drug ingredientCAS 7631-90-5
This drug ingredient has classified U.S. production volumes. EPA withholds the number 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.
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 unknownProduction 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
Country of origin for US imports, from Census customs data (2024).
IT 45%ItalyCA 17%CanadaIN 11%IndiaMY 7%MalaysiaVN 6%Vietnam
- Japan
- Norway
- Mexico
- United Kingdom
- Netherlands
EPA-registered manufacturers (21)
Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.
Chemtrade Logistics · CA Canada
Syensqo Sa · BE Belgium
Ter Hell &Co Gmbh · DE Germany
Alexander Chemical
Allied Universal
Show all 21
Chemtrade Holdco Us
Chevron Richmond California Refinery
Ecolab
Ecovyst
Gehring-Montgomery
Holland
Hydrite Chemical
Jci Jones Chemicals
Lanxess
Nalco- An Ecolab
Pvs Chemical Solutions
Rayonier
Solvay
Southern Ionics
Ssc Augusta
Thatcher
Domestic parents -- activity not disclosed (3)
EPA records name a US company for this chemical but do not disclose whether the company made it here or imported it.
Ascent Chemicals
Ineos Enterprise Us Hold
Polyventive
EPA-registered importers (4)
Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.
Azelis S A · LU Luxembourg
Azelis Us Holdings
Calfrac Well Services
Tannin
1 FDA-registered drug labeler
Fagron Inc
Why It Matters
Sectors
HealthAgricultureFoodEnergyWaterTransportationConstructionMetals & 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 23 sectors as 16 functional roles.
- •Oxidizing agent in Petroleum Lubricating Oil and Grease Manufacturing (5%)Processing—incorporation into formulation, mixture, or reaction product
- •Oxidizing agent in Not Known or Reasonably Ascertainable (45%)Processing—repackaging
- •Oxidizing agent in Fabricated Metal Product Manufacturing (15%)Processing—incorporation into formulation, mixture, or reaction product
- •Oxidizing agent in Utilities (25%)Processing—incorporation into formulation, mixture, or reaction product
- •Dye in Textiles, apparel, and leather manufacturingProcessing—incorporation into formulation, mixture, or reaction product
- •Reducing agent in Services (0%)Processing—repackaging
- •Reducing agent in Soap, Cleaning Compound, and Toilet Preparation Manufacturing (0%)Use—non-incorporative activities
- •Reducing agent in Agriculture, Forestry, Fishing and Hunting (0%)Use—non-incorporative activities
- •Reducing agent in Wholesale and Retail Trade (20%)Use—non-incorporative activities
- •Reducing agent in All Other Chemical Product and Preparation Manufacturing (0%)Processing—repackaging
- •Reducing agent in Pharmaceutical and Medicine Manufacturing (0%)Use—non-incorporative activities
- •Reducing agent in Utilities (40%)Use—non-incorporative activities
- •Bleaching agent in Paper Manufacturing (0%)Use—non-incorporative activities
- •Reducing agent in Petroleum Refineries (0%)Use—non-incorporative activities
- •Polymerization promoter in All Other Chemical Product and Preparation Manufacturing (10%)Processing as a reactant
- •Processing aids, specific to petroleum production in Oil and Gas Drilling, Extraction, and Support activities (0%)Processing as a reactant
- •Reducing agent in Food, beverage, and tobacco product manufacturing (0%)Use—non-incorporative activities
- •Intermediate in Soap, Cleaning Compound, and Toilet Preparation Manufacturing (0%)Processing as a reactant
- •Reducing agent in Textiles, apparel, and leather manufacturing (0%)Use—non-incorporative activities
- •Fixing agent (mordant) in All Other Chemical Product and Preparation Manufacturing (10%)Processing as a reactant
- •Reducing agent in Paper Manufacturing (30%)Use—non-incorporative activities
- •Reducing agent in Plastics Material and Resin Manufacturing (10%)Use—non-incorporative activities
- •Reducing agent in All Other Basic Inorganic Chemical Manufacturing (100%)Processing as a reactant
- •Antioxidant in Food, beverage, and tobacco product manufacturing (33%)Processing—incorporation into formulation, mixture, or reaction product
- •Intermediate in All Other Chemical Product and Preparation Manufacturing (100%)Processing as a reactant
- •Anti-scaling agent in Fabricated Metal Product Manufacturing (10%)Use—non-incorporative activities
- •Anti-scaling agent in Wood Product Manufacturing (1%)Use—non-incorporative activities
- •Anti-scaling agent in Utilities (57%)Use—non-incorporative activities
- •Anti-scaling agent in All Other Chemical Product and Preparation Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
- •Anti-scaling agent in Transportation Equipment Manufacturing (1%)Use—non-incorporative activities
- •Anti-scaling agent in Food, beverage, and tobacco product manufacturing (22%)Use—non-incorporative activities
- •Anti-scaling agent in Services (16%)Use—non-incorporative activities
- •Anti-scaling agent in Paper Manufacturing (1%)Use—non-incorporative activities
- •Anti-scaling agent in Petroleum Refineries (1%)Use—non-incorporative activities
- •Anti-scaling agent in Mining (except Oil and Gas) and support activities (1%)Use—non-incorporative activities
- •Surfactant (surface active agent) in Soap, Cleaning Compound, and Toilet Preparation Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
- •Reducing agent in Petroleum Lubricating Oil and Grease Manufacturing (1%)Processing—incorporation into formulation, mixture, or reaction product
- •Reducing agent in Primary Metal Manufacturing (8%)Processing as a reactant
- •Lubricating agent in Oil and Gas Drilling, Extraction, and Support activities (100%)Processing—incorporation into formulation, mixture, or reaction product
- •Corrosion inhibitor in Mining (except Oil and Gas) and support activities (80%)Use—non-incorporative activities
- •Tanning agents not otherwise specified in Textiles, apparel, and leather manufacturing (100%)Processing—incorporation into article
- •Anti-scaling agent in Primary Metal Manufacturing (1%)Use—non-incorporative activities
- •Anti-scaling agent in Miscellaneous Manufacturing (1%)Use—non-incorporative activities
- •Oxidizing agent in Rubber Product Manufacturing (1%)Use—non-incorporative activities
- •Oxidizing agent in Services (28%)Use—non-incorporative activities
- •Oxidizing agent in Wood Product Manufacturing (3%)Use—non-incorporative activities
- •Oxidizing agent in Petroleum Refineries (3%)Use—non-incorporative activities
- •Oxidizing agent in Miscellaneous Manufacturing (2%)Use—non-incorporative activities
- •Oxidizing agent in All Other Chemical Product and Preparation Manufacturing (1%)Use—non-incorporative activities
- •Oxidizing agent in Paper Manufacturing (4%)Use—non-incorporative activities
- •Oxidizing agent in Pharmaceutical and Medicine Manufacturing (2%)Use—non-incorporative activities
- •Oxidizing agent in Food, beverage, and tobacco product manufacturing (52%)Use—non-incorporative activities
- •Corrosion inhibitor in Utilities (100%)Use—non-incorporative activities
- •Processing aids, specific to petroleum production in Petroleum Refineries (1%)Processing as a reactant
- •Alloys in Primary Metal Manufacturing (1%)Use—non-incorporative activities
- •pH regulating agent in Miscellaneous Manufacturing (2%)Processing—incorporation into article
- •Reducing agent in Miscellaneous Manufacturing (19%)Processing—incorporation into article
Vendor Pricing
$0.03/gA2B Chem LLC
CountryUnited States
Pack$15.00 / 500 g
Purity62%
Vendors8 available
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
7 more vendors
| Vendor | Country Supplier country. Where available, shows shipping origin. When the supplier ships from a different country than where they are registered, both are shown. Most suppliers show registration country only. | $/g | Pack | Purity |
|---|---|---|---|---|
| AA BLOCKS | United States | $0.03 | 500 g | 62% |
| AK Scientific, Inc. | United States | $0.07 | 1 kg | 2% |
| Fluorochem UK | United Kingdom | $0.08 | 1 kg | 98% |
| Fluorochem EU | Germany | $0.08 | 1 kg | 98% |
| Sigma-Aldrich (Rush Stock) | Germany | $0.11 | 2.5 kg | — |
| Sigma-Aldrich | Germany | $0.11 | 2.5 kg | — |
| Combi-Blocks, Inc. | United States | $0.15 | 1 kg | 58% |
Chemical Identity
CAS7631-90-5
PubChem CID23665763
DTXSIDDTXSID8034902
FormulaHNaO3S
Mol. Weight104.06 g/mol
SMILESOS(=O)[O-].[Na+]
Data Sources
- EPA CompTox (DSSTox) · DTXSID8034902Retrieved 2026-04-06
- PubChem · compound 23665763Retrieved 2026-04-06
- EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
- FDA National Drug Code directoryRetrieved 2026-04-07
- US Census international tradeReporting year: 2024 · Retrieved 2026-10-04
Brief citations
Sodium bisulfite (CAS 7631-90-5) https://chemicalindependence.com/chemical/7631-90-5/ EPA CompTox (DSSTox): DTXSID8034902. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID8034902 PubChem: 23665763. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/23665763 EPA Chemical Data Reporting: 7631-90-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting FDA National Drug Code directory: CAS 7631-90-5. Retrieved 2026-04-07. https://open.fda.gov/data/ndc/ US Census international trade: HS 283210 for CAS 7631-90-5. Reporting year: 2024. https://usatrade.census.gov/