1,2-Benzenedicarboxylic acid, 4,4'-[(1-methylethylidene)bis(4,1-phenyleneoxy)]bis-

CAS 38103-05-8

US productionNot reported

Import value, 2024$370M

Top sourceIndia 45%

This chemical is listed as active in US commerce, but no company reported it to EPA’s survey for 2019 or 2023. Sites may have made or imported less than the threshold amount, or none.

Why supply is unknown

Production is reported production, not a complete census of factories. 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

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

No EPA sector or FDA product records name a use for this chemical.

Vendor Pricing

$453.00/gLabotest KG

CountryGermany

Pack$453.00 / 1000 mg

Purity90%

Vendors6 available

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

5 more vendors

Vendor	Country	$/g	Pack	Purity
Maybridge, Ltd.	United Kingdom	$2414.30	100 mg	90%
AK Scientific, Inc.	United States	$7160.00	25 mg	98%
Asinex	Netherlands	$9292.80	50 mg	90%
ChemBridge Corporation	Kazakhstan	$18000.00	5 mg	90%
TimTec, LLC (back-ordered)	United States	$32000.00	15 mg	94%

Chemical Identity

CAS38103-05-8

PubChem CIDNot recorded

DTXSIDDTXSID1068065

FormulaC31H24O10

Mol. Weight556.523 g/mol

SMILESCC(C)(C1=CC=C(OC2=CC(C(O)=O)=C(C=C2)C(O)=O)C=C1)C1=CC=C(OC2=CC(C(O)=O)=C(C=C2)C(O)=O)C=C1

Data Sources

EPA TSCA InventoryRetrieved 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'-[(1-methylethylidene)bis(4,1-phenyleneoxy)]bis- (CAS 38103-05-8) https://chemicalindependence.com/chemical/38103-05-8/ EPA TSCA Inventory: CAS 38103-05-8. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 291899 for CAS 38103-05-8. Reporting year: 2024. https://usatrade.census.gov/