1,3,4-Thiadiazole, 2,5-bis(tert-dodecyldithio)-

CAS 59656-20-1

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

US productionZero

Import value, 2024$6.4B

Import volumeCBI

Confidential Business Information. The EPA withholds this volume because publishing it could reveal the reporting company's trade secrets.

Top sourceSingapore 36%

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 293499 · basket

EPA reports by year

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

These shares come from HS customs code 293499, which covers 575 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).

SG 36%SingaporeIE 23%IrelandCN 11%ChinaCH 6%SwitzerlandIN 5%India

Finland
Netherlands
Canada
Indonesia
Mexico
Taiwan
South Korea
Austria
Croatia
Sweden
Ukraine
Denmark
Israel
Czech Republic
New Zealand
Hong Kong
Kyrgyzstan
Australia
Portugal
South Africa
Poland
Slovenia
Brazil
Slovakia
Vietnam
Latvia
Malta
Hungary
Romania
Kenya
Belarus
Russia
Turkey
Norway

EPA-registered importers (2)

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

Lanxess

Textile Rubber & Chemical

Why It Matters

Sectors

Energy

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

•Lubricating agent in Petroleum Lubricating Oil and Grease Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS59656-20-1

PubChem CID108795

DTXSIDDTXSID9069344

FormulaC26H50N2S5

Mol. Weight551 g/mol

SMILESCCCCCCCCCC(C)(C)SSC1=NN=C(S1)SSC(C)(C)CCCCCCCCC

Data Sources

EPA CompTox (DSSTox) · DTXSID9069344Retrieved 2026-04-06
PubChem · compound 108795Retrieved 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

1,3,4-Thiadiazole, 2,5-bis(tert-dodecyldithio)- (CAS 59656-20-1) https://chemicalindependence.com/chemical/59656-20-1/ EPA CompTox (DSSTox): DTXSID9069344. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID9069344 PubChem: 108795. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/108795 EPA Chemical Data Reporting: 59656-20-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 59656-20-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293499 for CAS 59656-20-1. Reporting year: 2024. https://usatrade.census.gov/