4-Methylbenzenesulfonic acid

CAS 104-15-4

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$40M

Top sourceGermany 22%

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 290410 · basket

EPA reports by year

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

These shares come from HS customs code 290410, which covers 115 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).

DE 22%GermanyIT 20%ItalyCN 14%ChinaBE 11%BelgiumIN 11%India

Spain
Netherlands
Czech Republic
Brazil
Taiwan
Hong Kong

EPA-registered manufacturers (3)

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

Capital Resin

Catexel Nease

Dynachem

Domestic parents -- activity not disclosed (4)

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

Allnex Usa

Newmarket

Polyventive

Stepan

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.

Aceto Us

Emco Chemical Distributors

The Sherwin Williams

Why It Matters

Sectors

AgricultureConstructionMetals & MiningPlastics & RubberTextilesConsumer ProductsPaints & CoatingsCore 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 11 sectors as 5 functional roles.

•Catalyst in Textiles, apparel, and leather manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•Intermediate in Miscellaneous Manufacturing (100%)Processing as a reactant
•Catalyst in Plastics Material and Resin Manufacturing (4%)Processing—incorporation into formulation, mixture, or reaction product
•Catalyst in Paint and Coating ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
•Catalyst in Furniture and Related Product ManufacturingProcessing—incorporation into article
•Catalyst in Not Known or Reasonably AscertainableProcessing—incorporation into article
•Catalyst in Wood Product ManufacturingProcessing—incorporation into article
•Surfactant (surface active agent) in Soap, Cleaning Compound, and Toilet Preparation Manufacturing (30%)Processing—incorporation into formulation, mixture, or reaction product
•Monomers in All Other Basic Organic Chemical Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•Solvent in Pesticide, Fertilizer, and Other Agricultural Chemical ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
•Catalyst in Miscellaneous Manufacturing (10%)Processing as a reactant
•Catalyst in Primary Metal Manufacturing (90%)Processing as a reactant

Vendor Pricing

$0.05/gAaron Chemicals LLC

CountryHong Kong

Pack$229.00 / 5 kg

Purity98%

Vendors19 available

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

18 more vendors

Vendor	Country	$/g	Pack	Purity
Fluorochem UK	United Kingdom	$0.06	1 kg	98%
Fluorochem EU	Germany	$0.06	1 kg	98%
Angene Chemical	China → Hong Kong	$0.07	500 g	98%
AA BLOCKS	United States	$0.18	1 kg	99%
A2B Chem LLC	United States	$0.27	500 g	99%
Angene International Limited	United States	$0.75	100 g	99%
IRIS Biotech Gmbh	Germany	$4.44	100 g	—
AstaTech, Inc	United States	$55.80	5 g	97%
Combi-Blocks (back-ordered)	United States	$666.00	5 g	95%
Specs	Netherlands	$1694.00	20 mg	90%
Otava, Ltd.	Ukraine	$2280.00	50 mg	95%
ChemBridge Corporation	Kazakhstan	$2400.00	100 mg	90%
Otava, Ltd. (2 weeks)	Ukraine	$2724.00	50 mg	95%
Princeton BioMolecular Research (SC)	United States	$2900.00	100 mg	90%
Vitas M Chemical Limited	Hong Kong	$3170.00	100 mg	90%
Angene	China → Hong Kong	$4266.67	30 mg	99%
Asinex	Netherlands	$6461.40	100 mg	90%
TimTec, LLC (back-ordered)	United States	$32000.00	15 mg	94%

Chemical Identity

CAS104-15-4

PubChem CID6101

DTXSIDDTXSID0026701

FormulaC7H8O3S

Mol. Weight172.2 g/mol

SMILESCC1=CC=C(C=C1)S(=O)(=O)O

Data Sources

EPA CompTox (DSSTox) · DTXSID0026701Retrieved 2026-04-06
PubChem · compound 6101Retrieved 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

4-Methylbenzenesulfonic acid (CAS 104-15-4) https://chemicalindependence.com/chemical/104-15-4/ EPA CompTox (DSSTox): DTXSID0026701. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID0026701 PubChem: 6101. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/6101 EPA Chemical Data Reporting: 104-15-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 104-15-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290410 for CAS 104-15-4. Reporting year: 2024. https://usatrade.census.gov/