Sulfur fluoride (SF6)

Drug ingredient

CAS 2551-62-4

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$36M

Top sourceChina 32%

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 281290 · basket

EPA reports by year

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

These shares come from HS customs code 281290, which covers 28 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 32%ChinaIN 23%IndiaDE 14%GermanyKR 13%South KoreaIT 8%Italy

Hong Kong
Taiwan
Czech Republic
Russia
Austria

Domestic parents -- activity not disclosed (1)

EPA records name a US company for this chemical but do not disclose whether the company made it here or imported it.

Efc Gases And Advanced Materials

EPA-registered importers (3)

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

Linde Plc · IE Ireland

Fci

Linde

Why It Matters

Sectors

HealthEnergyWaterElectronicsCore Chemicals

Downstream Uses

Appears in 1 drug and cosmetic product listings (FDA).

•Lumason

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.

•Intermediate in All Other Basic Inorganic Chemical Manufacturing (0%)Processing as a reactant
•Insulators in Industrial Gas Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS2551-62-4

PubChem CID17358

DTXSIDDTXSID8029656

FormulaF6S

Mol. Weight146.06 g/mol

SMILESFS(F)(F)(F)(F)F

Data Sources

EPA CompTox (DSSTox) · DTXSID8029656Retrieved 2026-04-06
PubChem · compound 17358Retrieved 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

Sulfur fluoride (SF6) (CAS 2551-62-4) https://chemicalindependence.com/chemical/2551-62-4/ EPA CompTox (DSSTox): DTXSID8029656. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID8029656 PubChem: 17358. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/17358 EPA Chemical Data Reporting: 2551-62-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 2551-62-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 281290 for CAS 2551-62-4. Reporting year: 2024. https://usatrade.census.gov/