4,4'-(4,4'-Isopropylidenediphenoxy)bisphthalic dianhydride

CAS 38103-06-9

Used in 1 industrial sector tracked by the EPA.

US production13.0M lb

Import value, 2024$370M

Import volume1.5M lb

Import dependency10%

Top sourceIndia 45%

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 291899 · basket

EPA reports by year

2023: US production 13.0M lb · Imports 1.5M lb
2019: US production Confidential · Imports Confidential

These shares come from HS customs code 291899, which covers 139 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).

IN 45%IndiaCN 35%ChinaGB 7%United KingdomCO 3%ColombiaCH 3%Switzerland

Austria
Hungary
South Korea
Taiwan
Czech Republic
Mexico
Spain
Ukraine
Estonia
Australia
Israel
Singapore
Slovakia
Russia

Why It Matters

Sectors

Plastics & Rubber

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 Plastics Material and Resin Manufacturing (100%)Processing as a reactant

Vendor Pricing

$0.26/gAaron Chemicals LLC

CountryHong Kong

Pack$130.00 / 500 g

Purity98%

Vendors21 available

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

20 more vendors

Vendor	Country	$/g	Pack	Purity
A2B Chem LLC	United States	$0.28	1 kg	97%
Angene Chemical	China → Hong Kong	$0.28	500 g	98%
AA BLOCKS	United States	$0.31	1 kg	97%
Combi-Blocks, Inc.	United States	$0.32	1 kg	98%
Chemscene	United States	$0.32	1 kg	—
BLD Pharmatech Ltd.	China	$0.39	1 kg	97%
Ambeed, Inc.	United States	$0.39	1 kg	97%
BLD Pharmatech Co., Limited	United States	$0.39	500 g	97%
BLD Pharmatech GmbH	Germany	$0.39	500 g	97%
AK Scientific Specialized	United States	$0.62	100 g	98%
Fluorochem EU	Germany	$0.73	25 g	95%
AK Scientific, Inc.	United States	$0.87	100 g	99%
AstaTech (2 weeks)	United States	$1.17	100 g	95%
Angene International Limited	United States	$1.69	100 g	99%
Sigma-Aldrich (Rush Stock)	Germany	$1.84	250 g	97%
Sigma-Aldrich	Germany	$1.84	250 g	97%
ChemBridge Corporation	Kazakhstan	$1860.00	100 mg	90%
Princeton BioMolecular Research (SC)	United States	$2900.00	100 mg	90%
Vitas M Chemical Limited	Hong Kong	$3170.00	100 mg	90%
Angene	China → Hong Kong	$4266.67	30 mg	98%

Chemical Identity

CAS38103-06-9

PubChem CID94483

DTXSIDDTXSID3028001

FormulaC31H20O8

Mol. Weight520.5 g/mol

SMILESCC(C)(C1=CC=C(C=C1)OC2=CC3=C(C=C2)C(=O)OC3=O)C4=CC=C(C=C4)OC5=CC6=C(C=C5)C(=O)OC6=O

Data Sources

EPA CompTox (DSSTox) · DTXSID3028001Retrieved 2026-04-06
PubChem · compound 94483Retrieved 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

4,4'-(4,4'-Isopropylidenediphenoxy)bisphthalic dianhydride (CAS 38103-06-9) https://chemicalindependence.com/chemical/38103-06-9/ EPA CompTox (DSSTox): DTXSID3028001. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID3028001 PubChem: 94483. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/94483 EPA Chemical Data Reporting: 38103-06-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 38103-06-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 291899 for CAS 38103-06-9. Reporting year: 2024. https://usatrade.census.gov/