Potassium sulfite

CAS 10117-38-1

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

Molecular structure of 10117-38-1 — 2 K⁺

US productionCBI

Confidential Business Information. The EPA withholds this volume because publishing it could reveal the reporting company's trade secrets.

Import value, 2024$4M

Top sourceItaly 46%

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 283220 · basket

EPA reports by year

2023: US production Confidential · Imports Confidential
2019: US production Confidential · Imports Confidential

These shares come from HS customs code 283220, which covers 11 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 46%ItalyCN 33%ChinaDE 18%GermanyIN 1%IndiaNZ 1%New Zealand

Denmark
Hong Kong
Japan
Spain

EPA-registered manufacturers (4)

Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.

Tessenderlo Group Nv/Sa · BE Belgium

Hydrite Chemical

Tessenderlo Kerley

Thatcher

EPA-registered importers (1)

Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.

Agfa

Why It Matters

Sectors

AgricultureMetals & Mining

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 2 sectors as 2 functional roles.

•Soil amendments (fertilizers) in Pesticide, Fertilizer, and Other Agricultural Chemical Manufacturing (81%)Processing as a reactant
•Reducing agent in Mining (except Oil and Gas) and support activities (100%)Processing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$0.01/gAaron Chemicals LLC

CountryHong Kong

Pack$7.00 / 500 g

Purity90%

Vendors10 available

Prices reflect listed pack sizes. Small research packs run far above bulk rates.

9 more vendors

Vendor	Country	$/g	Pack	Purity
Angene Chemical	China → Hong Kong	$0.02	500 g	96%
A2B Chem LLC	United States	$0.05	500 g	90%
AA BLOCKS	United States	$0.06	500 g	90%
Sigma-Aldrich (Rush Stock)	Germany	$0.13	3 kg	90%
Sigma-Aldrich	Germany	$0.13	3 kg	90%
Apollo Scientific US	United Kingdom	$0.14	1 kg	90%
AK Scientific, Inc.	United States	$0.98	100 g	90%
Angene International Limited	United States	$1.86	100 g	90%
Angene	China → Hong Kong	$4266.67	30 mg	96%

Chemical Identity

CAS10117-38-1

PubChem CID24958

DTXSIDDTXSID80889532

FormulaK2O3S

Mol. Weight158.26 g/mol

SMILES[O-]S(=O)[O-].[K+].[K+]

Data Sources

EPA CompTox (DSSTox) · DTXSID80889532Retrieved 2026-04-06
PubChem · compound 24958Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

Potassium sulfite (CAS 10117-38-1) https://chemicalindependence.com/chemical/10117-38-1/ EPA CompTox (DSSTox): DTXSID80889532. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID80889532 PubChem: 24958. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/24958 EPA Chemical Data Reporting: 10117-38-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 10117-38-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 283220 for CAS 10117-38-1. Reporting year: 2024. https://usatrade.census.gov/