1H-Indene-2-carboxylic acid, 5-chloro-2,3-dihydro-1-oxo-, methyl ester

CAS 65738-56-9

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.

Top sourceNo public record

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.

Where It Comes From

EPA reports by year

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

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.

Huntsman

Why It Matters

Sectors

AgricultureCore 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 2 sectors as 1 functional role.

•Intermediate in Pesticide, Fertilizer, and Other Agricultural Chemical ManufacturingProcessing as a reactant
•Intermediate in All Other Basic Inorganic Chemical Manufacturing (100%)Processing as a reactant

Vendor Pricing

$276.00/gAA BLOCKS (2 weeks)

CountryUnited States

Pack$1380.00 / 5 g

Purity96%

Vendors5 available

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

4 more vendors

Vendor	Country	$/g	Pack	Purity
AstaTech (2 weeks)	United States	$444.40	5 g	95%
A2B Chem LLC (1 week)	United States	$468.00	250 mg	96%
Aaron Chemicals LLC	Hong Kong	$636.00	250 mg	96%
Angene Chemical	China → Hong Kong	$688.00	250 mg	96%

Chemical Identity

CAS65738-56-9

PubChem CID11042391

DTXSIDDTXSID20886303

FormulaC11H9ClO3

Mol. Weight224.64 g/mol

SMILESCOC(=O)C1CC2=C(C1=O)C=CC(=C2)Cl

Data Sources

EPA CompTox (DSSTox) · DTXSID20886303Retrieved 2026-04-06
PubChem · compound 11042391Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04

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Brief citations

1H-Indene-2-carboxylic acid, 5-chloro-2,3-dihydro-1-oxo-, methyl ester (CAS 65738-56-9) https://chemicalindependence.com/chemical/65738-56-9/ EPA CompTox (DSSTox): DTXSID20886303. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID20886303 PubChem: 11042391. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/11042391 EPA Chemical Data Reporting: 65738-56-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 65738-56-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting