Dibutyl chlorendate

CAS 1770-80-5

Bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid, 1,4,5,6,7,7-hexachloro-, 2,3-dibutyl ester

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$37M

Top sourceChina 25%

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 291720 · basket

EPA reports by year

2023: US production Confidential · Imports Confidential

These shares come from HS customs code 291720, which covers 42 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 25%ChinaIT 21%ItalyJP 21%JapanDE 14%GermanyIN 9%India

Ukraine
South Africa
Malaysia
Netherlands
Mexico
United Kingdom
Switzerland
Latvia
Canada

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.

Norquay Technology

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 (1%)Processing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS1770-80-5

PubChem CIDNot recorded

DTXSIDDTXSID1051802

FormulaC17H20Cl6O4

Mol. Weight501.04 g/mol

SMILESCCCCOC(=O)C1C(C(=O)OCCCC)C2(Cl)C(Cl)=C(Cl)C1(Cl)C2(Cl)Cl

Data Sources

EPA TSCA InventoryRetrieved 2026-04-29
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

Dibutyl chlorendate (CAS 1770-80-5) https://chemicalindependence.com/chemical/1770-80-5/ EPA TSCA Inventory: CAS 1770-80-5. Retrieved 2026-04-29. https://www.epa.gov/tsca-inventory EPA Chemical Data Reporting: 1770-80-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 1770-80-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 291720 for CAS 1770-80-5. Reporting year: 2024. https://usatrade.census.gov/