Benzene, 1,1'-(1-methylethylidene)bis[4-(2-propen-1-yloxy)-

CAS 3739-67-1

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$59M

Import volumeZero

Top sourceChina 51%

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 290930 · basket

EPA reports by year

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

These shares come from HS customs code 290930, which covers 119 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 51%ChinaIN 23%IndiaIT 12%ItalyJP 9%JapanCA 2%Canada

Spain
Israel
Netherlands
Taiwan
Germany
Ireland
Switzerland
Ukraine
Mexico
United Kingdom
Australia

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

Construction

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 Adhesive Manufacturing (100%)Processing as a reactant

Vendor Pricing

$0.13/gAaron Chemicals LLC

CountryHong Kong

Pack$67.00 / 500 g

Purity90%

Vendors12 available

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

11 more vendors

Vendor	Country	$/g	Pack	Purity
A2B Chem LLC	United States	$0.14	500 g	98%
AA BLOCKS	United States	$0.15	500 g	98%
Angene Chemical	China → Hong Kong	$0.16	500 g	90%
BLD Pharmatech GmbH	Germany	$0.18	500 g	90%
BLD Pharmatech Ltd.	China	$0.18	500 g	90%
BLD Pharmatech Co., Limited	United States	$0.19	500 g	90%
Ambeed, Inc.	United States	$0.19	500 g	90%
Combi-Blocks, Inc.	United States	$0.30	500 g	97%
AK Scientific, Inc.	United States	$0.37	100 g	95%
Angene International Limited	United States	$0.93	100 g	95%
Angene	China → Hong Kong	$4266.67	30 mg	88%

Chemical Identity

CAS3739-67-1

PubChem CID77333

DTXSIDDTXSID30863266

FormulaC21H24O2

Mol. Weight308.4 g/mol

SMILESCC(C)(C1=CC=C(C=C1)OCC=C)C2=CC=C(C=C2)OCC=C

Data Sources

EPA CompTox (DSSTox) · DTXSID30863266Retrieved 2026-04-06
PubChem · compound 77333Retrieved 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

Benzene, 1,1'-(1-methylethylidene)bis[4-(2-propen-1-yloxy)- (CAS 3739-67-1) https://chemicalindependence.com/chemical/3739-67-1/ EPA CompTox (DSSTox): DTXSID30863266. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID30863266 PubChem: 77333. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/77333 EPA Chemical Data Reporting: 3739-67-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 3739-67-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290930 for CAS 3739-67-1. Reporting year: 2024. https://usatrade.census.gov/