2,3-Dichloro-1-propene

CAS 78-88-6

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$61M

Top sourceChina 56%

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 290329 · basket

EPA reports by year

2019: US production Confidential · Imports Confidential

These shares come from HS customs code 290329, which covers 39 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 56%ChinaDE 26%GermanyCZ 9%Czech RepublicMY 3%MalaysiaJP 3%Japan

Mexico
India
South Korea

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.

Hexion

Why It Matters

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

Vendor Pricing

$0.11/gA2B Chem LLC

CountryUnited States

Pack$55.00 / 500 g

Purity97%

Vendors8 available

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

7 more vendors

Vendor	Country	$/g	Pack	Purity
AA BLOCKS	United States	$0.14	500 g	97%
Apollo Scientific UK	United Kingdom	$0.60	1 kg	96%
AK Scientific, Inc.	United States	$0.79	100 g	98%
ALFA AESAR	Germany	$0.96	250 g	98%
AstaTech, Inc	United States	$1.92	25 g	95%
Sigma-Aldrich (Rush Stock)	Germany	$2.05	100 g	98%
Sigma-Aldrich	Germany	$2.05	100 g	98%

Chemical Identity

CAS78-88-6

PubChem CID6565

DTXSIDDTXSID6025012

FormulaC3H4Cl2

Mol. Weight110.97 g/mol

SMILESC=C(CCl)Cl

Data Sources

EPA CompTox (DSSTox) · DTXSID6025012Retrieved 2026-04-06
PubChem · compound 6565Retrieved 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

2,3-Dichloro-1-propene (CAS 78-88-6) https://chemicalindependence.com/chemical/78-88-6/ EPA CompTox (DSSTox): DTXSID6025012. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID6025012 PubChem: 6565. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/6565 EPA Chemical Data Reporting: 78-88-6. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290329 for CAS 78-88-6. Reporting year: 2024. https://usatrade.census.gov/