Chlorosulfuric acid

CAS 7790-94-5

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.

Import value, 2024$271K

Import volumeZero

Top sourceSwitzerland 100%

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.

Where It Comes From

Customs basis: HS 280620 · exact

EPA reports by year

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

Source Countries

Country of origin for US imports, from Census customs data (2024).

CH 100%Switzerland

Domestic parents -- activity not disclosed (2)

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

Textile Rubber And Chemical Company (Trcc)

Veolia Regeneration Services

Why It Matters

Sectors

HealthTextilesConsumer 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 5 sectors as 1 functional role.

•Intermediate in Paper Manufacturing (5%)Processing as a reactant
•Intermediate in Pharmaceutical and Medicine Manufacturing (1%)Processing as a reactant
•Intermediate in Synthetic Dye and Pigment Manufacturing (1%)Processing as a reactant
•Intermediate in All Other Basic Inorganic Chemical Manufacturing (40%)Processing as a reactant
•Intermediate in Soap, Cleaning Compound, and Toilet Preparation Manufacturing (50%)Processing as a reactant

Vendor Pricing

$0.15/gSigma-Aldrich (Rush Stock)

CountryGermany

Pack$147.60 / 1 kg

Purity99%

Vendors2 available

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

1 more vendor

Vendor	Country	$/g	Pack	Purity
Sigma-Aldrich	Germany	$0.15	1 kg	99%

Chemical Identity

CAS7790-94-5

PubChem CID24638

DTXSIDDTXSID1029706

FormulaClHO3S

Mol. Weight116.53 g/mol

SMILESOS(=O)(=O)Cl

Data Sources

EPA CompTox (DSSTox) · DTXSID1029706Retrieved 2026-04-06
PubChem · compound 24638Retrieved 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

Chlorosulfuric acid (CAS 7790-94-5) https://chemicalindependence.com/chemical/7790-94-5/ EPA CompTox (DSSTox): DTXSID1029706. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID1029706 PubChem: 24638. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/24638 EPA Chemical Data Reporting: 7790-94-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 7790-94-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 280620 for CAS 7790-94-5. Reporting year: 2024. https://usatrade.census.gov/