Thiirane

CAS 420-12-2

US productionNot reported

Import value, 2024$6.4B

Top sourceSingapore 36%

This chemical is listed as active in US commerce, but no company reported it to EPA’s survey for 2019 or 2023. Sites may have made or imported less than the threshold amount, or none.

Why supply is unknown

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

Where It Comes From

Customs basis: HS 293499 · basket

These shares come from HS customs code 293499, which covers 575 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).

SG 36%SingaporeIE 23%IrelandCN 11%ChinaCH 6%SwitzerlandIN 5%India

Finland
Netherlands
Canada
Indonesia
Mexico
Taiwan
South Korea
Austria
Croatia
Sweden
Ukraine
Denmark
Israel
Czech Republic
New Zealand
Hong Kong
Kyrgyzstan
Australia
Portugal
South Africa
Poland
Slovenia
Brazil
Slovakia
Vietnam
Latvia
Malta
Hungary
Romania
Kenya
Belarus
Russia
Turkey
Norway

Why It Matters

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

Vendor Pricing

$3.63/gSigma-Aldrich (Rush Stock)

CountryGermany

Pack$363.23 / 100 g

Purity98%

Vendors5 available

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

4 more vendors

Vendor	Country	$/g	Pack	Purity
Sigma-Aldrich	Germany	$3.63	100 g	98%
AK Scientific, Inc.	United States	$11.20	5 g	98%
AstaTech, Inc	United States	$16.60	5 g	95%
Otava, Ltd.	Ukraine	$2724.00	50 mg	98%

Chemical Identity

CAS420-12-2

PubChem CIDNot recorded

DTXSIDDTXSID3049411

FormulaC2H4S

Mol. Weight60.11 g/mol

SMILESC1CS1

Data Sources

EPA TSCA InventoryRetrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

Thiirane (CAS 420-12-2) https://chemicalindependence.com/chemical/420-12-2/ EPA TSCA Inventory: CAS 420-12-2. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 293499 for CAS 420-12-2. Reporting year: 2024. https://usatrade.census.gov/