4-Ethyl-1,3-dioxolan-2-one

CAS 4437-85-8

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$208M

Top sourceChina 28%

At least one company claimed its 2019 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: 2019. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 292090 · basket

EPA reports by year

2019: US production Confidential · Imports Confidential

These shares come from HS customs code 292090, which covers 98 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).

CN 28%ChinaKR 17%South KoreaIT 13%ItalyIN 10%IndiaDE 9%Germany

Poland
Switzerland
Ireland
Canada
Lithuania
Netherlands
Brazil
Malaysia
Hungary
Czech Republic
Saudi Arabia
Slovakia
Ukraine
Turkey

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.

Huntsman

Why It Matters

No EPA sector or FDA product records name a use for this chemical.

Vendor Pricing

$1.14/gAaron Chemicals LLC

CountryHong Kong

Pack$570.00 / 500 g

Purity98%

Vendors17 available

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

16 more vendors

Vendor	Country	$/g	Pack	Purity
Angene Chemical	China → Hong Kong	$1.22	500 g	98%
A2B Chem LLC	United States	$1.24	100 g	98%
Combi-Blocks, Inc.	United States	$1.37	500 g	98%
Chemscene	United States	$1.39	500 g	—
BLD Pharmatech GmbH	Germany	$1.40	500 g	98%
BLD Pharmatech Ltd.	China	$1.40	500 g	98%
AA BLOCKS	United States	$1.43	100 g	98%
Ambeed, Inc.	United States	$1.54	500 g	98%
Fluorochem EU	Germany	$1.69	500 g	98%
BLD Pharmatech Co., Limited	United States	$1.80	100 g	98%
AK Scientific Specialized	United States	$1.80	100 g	95%
AK Scientific, Inc.	United States	$2.41	100 g	98%
Fluorochem UK	United Kingdom	$2.52	25 g	98%
Angene International Limited	United States	$4.05	100 g	98%
AstaTech, Inc	United States	$4.35	100 g	95%
Angene	China → Hong Kong	$4266.67	30 mg	98%

Chemical Identity

CAS4437-85-8

PubChem CID107282

DTXSIDDTXSID9040342

FormulaC5H8O3

Mol. Weight116.11 g/mol

SMILESCCC1COC(=O)O1

Data Sources

EPA CompTox (DSSTox) · DTXSID9040342Retrieved 2026-04-06
PubChem · compound 107282Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2019 · Retrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

4-Ethyl-1,3-dioxolan-2-one (CAS 4437-85-8) https://chemicalindependence.com/chemical/4437-85-8/ EPA CompTox (DSSTox): DTXSID9040342. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID9040342 PubChem: 107282. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/107282 EPA Chemical Data Reporting: 4437-85-8. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 292090 for CAS 4437-85-8. Reporting year: 2024. https://usatrade.census.gov/