4-Dodecylbenzenesulfonic acid

CAS 121-65-3

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 2019 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: 2019. 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

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

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.

Shrieve Chemical

Why It Matters

Sectors

Consumer Products

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

•Surface active agents in Soap, Cleaning Compound, and Toilet Preparation ManufacturingProcessing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$0.20/gManchester Organics

CountryUnited Kingdom

Pack$49.36 / 250 g

Purity95%

Vendors12 available

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

11 more vendors

Vendor	Country	$/g	Pack	Purity
Apollo Scientific UK	United Kingdom	$0.48	100 g	95%
Combi-Blocks, Inc.	United States	$0.48	500 g	95%
A2B Chem LLC	United States	$0.52	500 g	—
AA BLOCKS	United States	$0.55	500 g	—
AK Scientific, Inc.	United States	$0.69	100 g	70%
Aaron Chemicals LLC	Hong Kong	$0.81	100 g	95%
Angene Chemical	China → Hong Kong	$0.88	100 g	95%
Synthonix	United States	$2.80	25 g	95%
AstaTech, Inc	United States	$3.08	25 g	95%
Angene International Limited	United States	$3.28	25 g	95%
Angene	China → Hong Kong	$4266.67	30 mg	95%

Chemical Identity

CAS121-65-3

PubChem CID8485

DTXSIDDTXSID8050443

FormulaC18H30O3S

Mol. Weight326.5 g/mol

SMILESCCCCCCCCCCCCC1=CC=C(C=C1)S(=O)(=O)O

Data Sources

EPA CompTox (DSSTox) · DTXSID8050443Retrieved 2026-04-06
PubChem · compound 8485Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2019 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2019 · Retrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

4-Dodecylbenzenesulfonic acid (CAS 121-65-3) https://chemicalindependence.com/chemical/121-65-3/ EPA CompTox (DSSTox): DTXSID8050443. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID8050443 PubChem: 8485. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/8485 EPA Chemical Data Reporting: 121-65-3. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 121-65-3. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290410 for CAS 121-65-3. Reporting year: 2024. https://usatrade.census.gov/