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4-(1,1,3,3-Tetramethylbutyl)phenol

CAS 140-66-9

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

Molecular structure of 140-66-9
US productionCBI
Import value, 2024$2M
Top sourceTaiwan 77%

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 290713 · basket

EPA reports by year
2023
US production Confidential · Imports Confidential
2019
US production Confidential · Imports 944.5K lb

These shares come from HS customs code 290713, which covers 12 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
TW 77%TaiwanBR 11%BrazilCN 8%ChinaPL 3%PolandMX 1%Mexico
EPA-registered manufacturers (2)
Sumitomo Bakelite · JP Japan
Sumitomo Bakelite North America Holding
Domestic parents -- activity not disclosed (1)
Si Group

Why It Matters

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

Industrial Uses

Used in 3 sectors as 4 functional roles.

  • •Surfactant (surface active agent) in Plastics Product ManufacturingProcessing as a reactant
  • •Monomers in Plastics Material and Resin Manufacturing (100%)Processing as a reactant
  • •Intermediate in Plastics Material and Resin Manufacturing (10%)Processing as a reactant
  • •Surfactant (surface active agent) in All Other Basic Organic Chemical Manufacturing (80%)Processing as a reactant
  • •Processing aids, specific to petroleum production in Plastics Material and Resin Manufacturing (10%)Processing as a reactant

Vendor Pricing

$0.02/gAaron Chemicals LLC
CountryHong Kong
Pack$9.00 / 500 g
Purity97%
Vendors20 available

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

19 more vendors
VendorCountry$/gPackPurity
Angene ChemicalChina → Hong Kong$0.02500 g97%
A2B Chem LLCUnited States$0.05500 g97%
AA BLOCKSUnited States$0.05500 g95%
Sigma-Aldrich (Rush Stock)Germany$0.081 kg97%
Sigma-AldrichGermany$0.081 kg97%
MedChemExpress MCESweden$0.081 kg99.7%
AK Scientific SpecializedUnited States$0.22100 g95%
Combi-Blocks, Inc.United States$0.251 kg95%
AK Scientific, Inc.United States$0.29100 g97%
Fluorochem EUGermany$0.3425 g97%
Angene International LimitedUnited States$0.70100 g95%
AstaTech (2 weeks)United States$0.99100 g95%
InterbioscreenHong Kong$129.0010 g95%
Apexbio Technology LLCUnited States$142.00500 mg97.48%
Otava, Ltd.Ukraine$2280.0050 mg95%
Otava, Ltd. (2 weeks)Ukraine$2724.0050 mg95%
AngeneChina → Hong Kong$4266.6730 mg97%
Princeton BioMolecular Research (SC)United States$8000.0015 mg90%
Vitas M Chemical LimitedHong Kong$9000.0010 mg90%

Chemical Identity

CAS140-66-9
PubChem CID8814
DTXSIDDTXSID9022360
FormulaC14H22O
Mol. Weight206.32 g/mol
SMILESCC(C)(C)CC(C)(C)C1=CC=C(C=C1)O

Data Sources

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Brief citations

4-(1,1,3,3-Tetramethylbutyl)phenol (CAS 140-66-9) https://chemicalindependence.com/chemical/140-66-9/ EPA CompTox (DSSTox): DTXSID9022360. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID9022360 PubChem: 8814. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/8814 EPA Chemical Data Reporting: 140-66-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 140-66-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290713 for CAS 140-66-9. Reporting year: 2024. https://usatrade.census.gov/