Didodecyl 3,3'-sulfanediyldipropanoate

CAS 123-28-4

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$760M

Top sourceChina 33%

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 293090 · basket

EPA reports by year

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

These shares come from HS customs code 293090, which covers 418 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 33%ChinaES 14%SpainCH 9%SwitzerlandIT 7%ItalyIN 7%India

Israel
Croatia
Ukraine
Slovakia
United Arab Emirates
Ireland
Poland
Lithuania
Brazil
Singapore
Australia
Armenia
Hong Kong
Vietnam
Czech Republic
Hungary
Greece
Russia

EPA-registered manufacturers (1)

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

Evans Chemetics Lp Dba Bruno Bock

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.

Si Group

EPA-registered importers (8)

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

Basf Se · DE Germany

Lg Chem · KR South Korea

Songwon Industrial · KR South Korea

Basf

Ineos Styrolution America

Show all 8

Lg Chem America

Mayzo

Songwon

Why It Matters

Sectors

ConstructionMetals & MiningPlastics & RubberConsumer 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 9 sectors as 4 functional roles.

•Antioxidant in Plastics Material and Resin ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
•Antioxidant in Paint and Coating ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
•Antioxidant in All Other Chemical Product and Preparation Manufacturing (100%)Processing as a reactant
•Antioxidant in Plastics Product Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•Antioxidant in Adhesive Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•Chemical reaction regulator in Plastics Material and Resin Manufacturing (10%)Processing—incorporation into formulation, mixture, or reaction product
•Chemical reaction regulator in Synthetic Rubber Manufacturing (90%)Processing—incorporation into formulation, mixture, or reaction product
•Intermediate in Soap, Cleaning Compound, and Toilet Preparation ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
•Intermediate in OtherProcessing—incorporation into formulation, mixture, or reaction product
•Heat stabilizer in Plastics Material and Resin Manufacturing (45%)Processing—repackaging
•Heat stabilizer in Custom Compounding of Purchased Resins (32%)Processing—incorporation into article
•Heat stabilizer in Plastics Product Manufacturing (22%)Processing—incorporation into article

Vendor Pricing

$0.02/gAaron Chemicals LLC

CountryHong Kong

Pack$12.00 / 500 g

Purity98%

Vendors16 available

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

15 more vendors

Vendor	Country	$/g	Pack	Purity
Angene Chemical	China → Hong Kong	$0.03	500 g	98%
MedChemExpress MCE	Sweden	$0.08	500 g	99.75%
Fluorochem EU	Germany	$0.10	100 g	98%
A2B Chem LLC	United States	$0.11	500 g	90%
AA BLOCKS	United States	$0.13	500 g	90%
AK Scientific Specialized	United States	$0.22	500 g	95%
Combi-Blocks, Inc.	United States	$0.25	1 kg	90%
Sigma-Aldrich (Rush Stock)	Germany	$0.47	250 g	97%
Sigma-Aldrich	Germany	$0.47	250 g	97%
AK Scientific, Inc.	United States	$0.85	100 g	97%
AstaTech (2 weeks)	United States	$1.17	100 g	95%
MedKoo Biosciences, Inc	United States	$18.00	25 g	98%
Cayman Europe	Estonia	$20.33	50 g	98%
Angene International Limited	United States	$116.00	1 g	97%
Angene	China → Hong Kong	$4266.67	30 mg	98%

Chemical Identity

CAS123-28-4

PubChem CID31250

DTXSIDDTXSID2026999

FormulaC30H58O4S

Mol. Weight514.8 g/mol

SMILESCCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCC

Data Sources

EPA CompTox (DSSTox) · DTXSID2026999Retrieved 2026-04-06
PubChem · compound 31250Retrieved 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

Didodecyl 3,3'-sulfanediyldipropanoate (CAS 123-28-4) https://chemicalindependence.com/chemical/123-28-4/ EPA CompTox (DSSTox): DTXSID2026999. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID2026999 PubChem: 31250. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/31250 EPA Chemical Data Reporting: 123-28-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 123-28-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293090 for CAS 123-28-4. Reporting year: 2024. https://usatrade.census.gov/