Phenol, 4,4'-[1-[4-[1-(4-hydroxyphenyl)-1-methylethyl]phenyl]ethylidene]bis-

CAS 110726-28-8

EPA’s 2023 records show zero U.S. production of this chemical.

US productionZero

Import volumeCBI

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. Production reporting year: 2023.

Where It Comes From

EPA reports by year

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

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

•Photosensitizers in All Other Chemical Product and Preparation Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$0.57/gAaron Chemicals LLC

CountryHong Kong

Pack$286.00 / 500 g

Purity98%

Vendors12 available

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

11 more vendors

Vendor	Country	$/g	Pack	Purity
Angene Chemical	China → Hong Kong	$0.61	500 g	98%
A2B Chem LLC	United States	$0.82	500 g	98%
Combi-Blocks, Inc.	United States	$1.00	500 g	98%
AA BLOCKS	United States	$1.07	500 g	98%
BLD Pharmatech Ltd.	China	$1.14	500 g	98%
AstaTech, Inc	United States	$1.24	250 g	95%
BLD Pharmatech GmbH	Germany	$1.43	100 g	98%
Angene International Limited	United States	$2.19	250 g	95%
Ambeed, Inc.	United States	$2.30	10 g	98%
BLD Pharmatech Co., Limited	United States	$2.40	5 g	98%
Angene	China → Hong Kong	$4266.67	30 mg	98%

Chemical Identity

CAS110726-28-8

PubChem CID634278

DTXSIDDTXSID3073052

FormulaC29H28O3

Mol. Weight424.5 g/mol

SMILESCC(C)(C1=CC=C(C=C1)C(C)(C2=CC=C(C=C2)O)C3=CC=C(C=C3)O)C4=CC=C(C=C4)O

Data Sources

EPA CompTox (DSSTox) · DTXSID3073052Retrieved 2026-04-06
PubChem · compound 634278Retrieved 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

Phenol, 4,4'-[1-[4-[1-(4-hydroxyphenyl)-1-methylethyl]phenyl]ethylidene]bis- (CAS 110726-28-8) https://chemicalindependence.com/chemical/110726-28-8/ EPA CompTox (DSSTox): DTXSID3073052. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID3073052 PubChem: 634278. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/634278 EPA Chemical Data Reporting: 110726-28-8. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 110726-28-8. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting