Isobutylbenzene

CAS 538-93-2

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$68M

Top sourceIndia 35%

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 290290 · basket

EPA reports by year

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

These shares come from HS customs code 290290, which covers 171 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 35%IndiaTW 11%TaiwanES 10%SpainDE 10%GermanyCN 8%China

Czech Republic
Netherlands
Switzerland
Pakistan
United Kingdom
Austria
Denmark
Indonesia
Lithuania
Hong Kong
Finland

Domestic parents -- activity not disclosed (1)

EPA records name a US company for this chemical but do not disclose whether the company made it here or imported it.

Si Group

EPA-registered importers (2)

Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.

Basf Se · DE Germany

Basf

Why It Matters

Sectors

HealthCore 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

Used in 2 sectors as 1 functional role.

•Intermediate in All Other Basic Organic Chemical Manufacturing (100%)Processing as a reactant
•Intermediate in Pharmaceutical and Medicine ManufacturingProcessing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$0.48/gCombi-Blocks, Inc.

CountryUnited States

Pack$240.00 / 500 g

Purity98%

Vendors3 available

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

2 more vendors

Vendor	Country	$/g	Pack	Purity
A2B Chem LLC	United States	$0.52	500 g	98%
AA BLOCKS	United States	$0.55	500 g	98%

Chemical Identity

CAS538-93-2

PubChem CID10870

DTXSIDDTXSID6027181

FormulaC10H14

Mol. Weight134.22 g/mol

SMILESCC(C)CC1=CC=CC=C1

Data Sources

EPA CompTox (DSSTox) · DTXSID6027181Retrieved 2026-04-06
PubChem · compound 10870Retrieved 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

Isobutylbenzene (CAS 538-93-2) https://chemicalindependence.com/chemical/538-93-2/ EPA CompTox (DSSTox): DTXSID6027181. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID6027181 PubChem: 10870. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/10870 EPA Chemical Data Reporting: 538-93-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 538-93-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290290 for CAS 538-93-2. Reporting year: 2024. https://usatrade.census.gov/