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3,3'-Thiodipropionic acid

CAS 111-17-1

EPA’s 2023 records show zero U.S. production of this chemical.

Molecular structure of 111-17-1
US productionZero
Import value, 2024$760M
Import volumeCBI
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. 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 Zero · 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
CN 33%ChinaES 14%SpainCH 9%SwitzerlandIT 7%ItalyIN 7%India
Domestic parents -- activity not disclosed (1)
Evans Chemetics Lp Dba Bruno Bock
EPA-registered importers (2)
Kowa · JP Japan
Kowa Holdings America

Why It Matters

Sectors
ConstructionPlastics & RubberPaints & Coatings
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 4 sectors as 2 functional roles.

  • •Monomers in Adhesive Manufacturing (50%)Processing as a reactant
  • •Monomers in Plastics Material and Resin Manufacturing (25%)Processing as a reactant
  • •Monomers in Paint and Coating Manufacturing (25%)Processing as a reactant
  • •Stabilizing agent in Plastics Product Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$0.03/gAaron Chemicals LLC
CountryHong Kong
Pack$13.00 / 500 g
Purity99%
Vendors20 available

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

19 more vendors
VendorCountry$/gPackPurity
Angene ChemicalChina → Hong Kong$0.03500 g99%
A2B Chem LLCUnited States$0.04500 g98%
BLD Pharmatech Ltd.China$0.051 kg99%
BLD Pharmatech GmbHGermany$0.05500 g99%
AA BLOCKSUnited States$0.05500 g99%
ChemsceneUnited States$0.051 kg—
Sigma-Aldrich (Rush Stock)Germany$0.083 kg97%
Sigma-AldrichGermany$0.083 kg97%
AK Scientific SpecializedUnited States$0.09500 g95%
MedChemExpress MCESweden$0.091 kg98%
Ambeed, Inc.United States$0.111 kg99%
AK Scientific, Inc.United States$0.12500 g98%
BLD Pharmatech Co., LimitedUnited States$0.13500 g99%
ALFA AESARGermany$0.14250 g98%
Angene International LimitedUnited States$0.21500 g95%
MedKoo Biosciences, IncUnited States$0.213 kg98%
AstaTech, IncUnited States$1.9225 g95%
Labotest KGGermany$217.805000 mg90%
AngeneChina → Hong Kong$4266.6730 mg99%

Chemical Identity

CAS111-17-1
PubChem CID8096
DTXSIDDTXSID8044200
FormulaC6H10O4S
Mol. Weight178.21 g/mol
SMILESC(CSCCC(=O)O)C(=O)O

Data Sources

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Brief citations

3,3'-Thiodipropionic acid (CAS 111-17-1) https://chemicalindependence.com/chemical/111-17-1/ EPA CompTox (DSSTox): DTXSID8044200. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID8044200 PubChem: 8096. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/8096 EPA Chemical Data Reporting: 111-17-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 111-17-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293090 for CAS 111-17-1. Reporting year: 2024. https://usatrade.census.gov/