1,2-Benzenedicarboxylic acid, 4,4'-carbonylbis-

CAS 2479-49-4

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$65M

Import volumeZero

Top sourceChina 20%

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 291830 · basket

EPA reports by year

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

These shares come from HS customs code 291830, which covers 98 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 20%ChinaIN 19%IndiaIT 19%ItalyCH 15%SwitzerlandJP 15%Japan

Netherlands
Ukraine
United Kingdom
New Zealand
Taiwan
Malaysia
Belgium
Madagascar
South Korea
Israel

EPA-registered manufacturers (2)

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

Cabb Group Gmbh · DE Germany

Kansas Holdco 1

Why It Matters

Sectors

Core 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

•Intermediate in All Other Basic Organic Chemical Manufacturing (100%)Processing as a reactant

Vendor Pricing

$266.00/gTargetMol Chemicals

CountryChina (registered: United States)

Pack$133.00 / 500 mg

Purity98.24%

Vendors15 available

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

14 more vendors

Vendor	Country	$/g	Pack	Purity
Aaron Chemicals LLC	Hong Kong	$332.00	250 mg	98%
Angene Chemical	China → Hong Kong	$388.00	250 mg	98%
BLD Pharmatech Co., Limited	United States	$429.00	1 g	98%
BLD Pharmatech Ltd.	China	$429.00	1 g	98%
Ambeed, Inc.	United States	$429.00	1 g	98%
Combi-Blocks, Inc.	United States	$429.00	1 g	95%
A2B Chem LLC	United States	$588.00	250 mg	98%
AA BLOCKS	United States	$652.00	250 mg	98%
AstaTech, Inc	United States	$800.00	250 mg	95%
Angene International Limited	United States	$1512.00	250 mg	98%
BLD Pharmatech GmbH	Germany	$1720.00	50 mg	98%
MedChemExpress MCE	Sweden	$2250.60	100 mg	99.55%
Angene	China → Hong Kong	$4266.67	30 mg	98%
Key Organics Ltd.	United Kingdom	$6900.00	10 mg	95%

Chemical Identity

CAS2479-49-4

PubChem CID75592

DTXSIDDTXSID2062456

FormulaC17H10O9

Mol. Weight358.3 g/mol

SMILESC1=CC(=C(C=C1C(=O)C2=CC(=C(C=C2)C(=O)O)C(=O)O)C(=O)O)C(=O)O

Data Sources

EPA CompTox (DSSTox) · DTXSID2062456Retrieved 2026-04-06
PubChem · compound 75592Retrieved 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

1,2-Benzenedicarboxylic acid, 4,4'-carbonylbis- (CAS 2479-49-4) https://chemicalindependence.com/chemical/2479-49-4/ EPA CompTox (DSSTox): DTXSID2062456. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID2062456 PubChem: 75592. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/75592 EPA Chemical Data Reporting: 2479-49-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 2479-49-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 291830 for CAS 2479-49-4. Reporting year: 2024. https://usatrade.census.gov/