Potassium perfluorobutanesulfonate

CAS 29420-49-3

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

Molecular structure of 29420-49-3 — 1 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$9M

Import volumeZero

Top sourceChina 53%

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 290499 · basket

EPA reports by year

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

These shares come from HS customs code 290499, which covers 112 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).

CN 53%ChinaIN 30%IndiaUA 4%UkraineTW 4%TaiwanIT 4%Italy

United Kingdom
Japan
Canada
Czech Republic
South Korea
Lithuania
Latvia
Russia

EPA-registered manufacturers (2)

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

Aceto Us

Why It Matters

Sectors

ElectronicsCore 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 3 sectors as 2 functional roles.

•Surfactant (surface active agent) in All Other Chemical Product and Preparation Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•Flame retardant in All Other Chemical Product and Preparation ManufacturingProcessing—repackaging
•Flame retardant in Electrical Equipment, Appliance, and Component ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
•Flame retardant in All Other Basic Organic Chemical ManufacturingProcessing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS29420-49-3

PubChem CID23675274

DTXSIDDTXSID3037707

FormulaC4F9KO3S

Mol. Weight338.19 g/mol

SMILESC(C(C(F)(F)S(=O)(=O)[O-])(F)F)(C(F)(F)F)(F)F.[K+]

Data Sources

EPA CompTox (DSSTox) · DTXSID3037707Retrieved 2026-04-06
PubChem · compound 23675274Retrieved 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 perfluorobutanesulfonate (CAS 29420-49-3) https://chemicalindependence.com/chemical/29420-49-3/ EPA CompTox (DSSTox): DTXSID3037707. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID3037707 PubChem: 23675274. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/23675274 EPA Chemical Data Reporting: 29420-49-3. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 29420-49-3. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290499 for CAS 29420-49-3. Reporting year: 2024. https://usatrade.census.gov/