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Phenol, 4,4',4''-(1-methyl-1-propanyl-3-ylidene)tris 2-(1,1-dimethylethyl)-5-methyl-

CAS 1843-03-4

U.S. production volumes are classified as confidential business information.

Molecular structure of 1843-03-4
US productionCBI
Import value, 2024$72M
Top sourceIndia 30%

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 290729 · basket

EPA reports by year
2023
US production Confidential · Imports Confidential
2019
US production Confidential · Imports Confidential

These shares come from HS customs code 290729, which covers 82 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
IN 30%IndiaDE 19%GermanyCN 16%ChinaJP 11%JapanIT 7%Italy
Domestic parents -- activity not disclosed (3)
Aurorium
Mitsubishi International Polymertrade
Si Group
EPA-registered importers (3)
Basf Se · DE Germany
Basf
M Chemical

Why It Matters

Sectors
Plastics & RubberPaper & PrintingCore Chemicals
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 4 sectors as 3 functional roles.

  • •Antioxidant in Plastics Material and Resin Manufacturing (50%)Processing—incorporation into formulation, mixture, or reaction product
  • •UV stabilizer in Synthetic Rubber Manufacturing (50%)Processing—incorporation into formulation, mixture, or reaction product
  • •Antioxidant in Synthetic Rubber Manufacturing (50%)Processing—incorporation into formulation, mixture, or reaction product
  • •UV stabilizer in Plastics Material and Resin Manufacturing (50%)Processing—incorporation into formulation, mixture, or reaction product
  • •Antioxidant in Plastics Product Manufacturing (100%)Processing—incorporation into article
  • •Intermediate in All Other Chemical Product and Preparation ManufacturingProcessing as a reactant

Vendor Pricing

$0.13/gAaron Chemicals LLC
CountryHong Kong
Pack$65.00 / 500 g
Purity95%
Vendors12 available

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

11 more vendors
VendorCountry$/gPackPurity
Angene ChemicalChina → Hong Kong$0.14500 g95%
AstaTech, IncUnited States$19.7625 g95%
A2B Chem LLCUnited States$20.7625 g95%
AA BLOCKSUnited States$22.9625 g95%
Angene International LimitedUnited States$33.1625 g95%
Combi-Blocks, Inc.United States$36.005 g95%
AK Scientific, Inc.United States$49.405 g98%
TargetMol ChemicalsChina → United States$770.00500 mg99.53%
MolnovaChina$964.00500 mg99%
MedChemExpress MCESweden$2347.40100 mg98.11%
AngeneChina → Hong Kong$4266.6730 mg95%

Chemical Identity

CAS1843-03-4
PubChem CID92905
DTXSIDDTXSID0038883
FormulaC37H52O3
Mol. Weight544.8 g/mol
SMILESCC1=CC(=C(C=C1C(C)CC(C2=CC(=C(C=C2C)O)C(C)(C)C)C3=CC(=C(C=C3C)O)C(C)(C)C)C(C)(C)C)O

Data Sources

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Brief citations

Phenol, 4,4',4''-(1-methyl-1-propanyl-3-ylidene)tris 2-(1,1-dimethylethyl)-5-methyl- (CAS 1843-03-4) https://chemicalindependence.com/chemical/1843-03-4/ EPA CompTox (DSSTox): DTXSID0038883. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID0038883 PubChem: 92905. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/92905 EPA Chemical Data Reporting: 1843-03-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 1843-03-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290729 for CAS 1843-03-4. Reporting year: 2024. https://usatrade.census.gov/