1-Butene, 3,3-dimethyl-

CAS 558-37-2

Companies reported imports and no US production of this chemical to EPA for 2023.

US productionZero

Import value, 2024$246M

Import volume654.4K lb

Import dependency100%

Top sourceCanada 51%

Production is reported production, not a complete census of factories. Production reporting year: 2023. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

1-Butene, 3,3-dimethyl- · US import value by year

Peak 2013: $537M · 2024: $246M · 2025: $281M

Where It Comes From

Customs basis: HS 290129 · basket

EPA reports by year

2023: US production Zero · Imports 654.4K lb

These shares come from HS customs code 290129, which covers 108 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).

CA 51%CanadaZA 32%South AfricaBR 6%BrazilJP 4%JapanIT 1%Italy

Spain
Ireland
India
United Kingdom
Malaysia
Dominican Republic
Mexico
Switzerland
Australia
South Korea
Turkey
Portugal
Morocco
Guyana
Poland
Netherlands
Belgium
Slovakia
Ukraine

EPA-registered importers (1)

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

Systech Environmental

Why It Matters

Sectors

Construction

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

•Fuel in Non-metallic Mineral Product Manufacturing (includes clay, glass, cement, concrete, lime, gypsum, and other non-metallic mineral product manufacturing)Processing—repackaging

Vendor Pricing

$1.64/gAaron Chemicals LLC

CountryHong Kong

Pack$164.00 / 100 g

Purity99%

Vendors7 available

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

6 more vendors

Vendor	Country	$/g	Pack	Purity
Angene Chemical	China → Hong Kong	$1.67	100 g	99%
AK Scientific, Inc.	United States	$6.20	5 g	96%
A2B Chem LLC	United States	$6.80	5 g	96%
AA BLOCKS	United States	$7.00	5 g	96%
Angene International Limited	United States	$16.60	5 g	96%
Angene	China → Hong Kong	$4266.67	30 mg	99%

Chemical Identity

CAS558-37-2

PubChem CIDNot recorded

DTXSIDDTXSID1027211

FormulaC6H12

Mol. Weight84.162 g/mol

SMILESCC(C)(C)C=C

Data Sources

EPA TSCA InventoryRetrieved 2026-04-29
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

1-Butene, 3,3-dimethyl- (CAS 558-37-2) https://chemicalindependence.com/chemical/558-37-2/ EPA TSCA Inventory: CAS 558-37-2. Retrieved 2026-04-29. https://www.epa.gov/tsca-inventory EPA Chemical Data Reporting: 558-37-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 558-37-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290129 for CAS 558-37-2. Reporting year: 2024. https://usatrade.census.gov/