Ethylstyrene

CAS 28106-30-1

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$68M

Import volumeZero

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 Zero
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

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.

Dupont Specialty Products Usa

Why It Matters

Sectors

Plastics & Rubber

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

•Monomers in Plastics Material and Resin Manufacturing (100%)Processing as a reactant

Vendor Pricing

$102.00/gA2B Chem LLC (2 weeks)

CountryUnited States

Pack$510.00 / 5 g

Purity95%

Vendors2 available

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

1 more vendor

Vendor	Country	$/g	Pack	Purity
AA BLOCKS (2 weeks)	United States	$194.00	1 g	95%

Chemical Identity

CAS28106-30-1

PubChem CID24218

DTXSIDDTXSID5027938

FormulaC10H12

Mol. Weight132.2 g/mol

SMILESCCC1=CC=CC=C1C=C

Data Sources

EPA CompTox (DSSTox) · DTXSID5027938Retrieved 2026-04-06
PubChem · compound 24218Retrieved 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

Ethylstyrene (CAS 28106-30-1) https://chemicalindependence.com/chemical/28106-30-1/ EPA CompTox (DSSTox): DTXSID5027938. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID5027938 PubChem: 24218. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/24218 EPA Chemical Data Reporting: 28106-30-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 28106-30-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290290 for CAS 28106-30-1. Reporting year: 2024. https://usatrade.census.gov/