Ethyne

CAS 74-86-2

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$246M

Top sourceCanada 51%

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 290129 · basket

EPA reports by year

2023: US production Confidential · Imports Confidential
2019: US production Confidential · Imports Confidential

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 manufacturers (14)

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

Basf Se · DE Germany

Linde Plc · IE Ireland

Nippon Sanso Holdings · JP Japan

Shell Plc · GB United Kingdom

Shin-Etsu Chemical · JP Japan

Show all 14

Airgas Usa, Llc - Nor Pac

Basf

Dow Chemical

Linde

Lyondell Chemical

Matheson Tri-Gas

Nexair

Shell Petroleum

Shintech Louisiana

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.

Chevron Phillips Chemical

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.

Clarios

Why It Matters

Sectors

EnergyElectronicsTransportationConstructionMetals & MiningPlastics & RubberConsumer ProductsCore Chemicals

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

Used in 5 sectors as 5 functional roles.

•Intermediate in Petrochemical Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•Heat transferring agent in Electrical Equipment, Appliance, and Component ManufacturingUse—non-incorporative activities
•Fuel in Fabricated Metal Product Manufacturing (40%)Use—non-incorporative activities
•Fuel in Petrochemical Manufacturing (100%)Processing as a reactant
•Fuel in Industrial Gas Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•Fuel agents in Industrial Gas Manufacturing (100%)Use—non-incorporative activities
•Monomers in Plastics Material and Resin ManufacturingProcessing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS74-86-2

PubChem CID6326

DTXSIDDTXSID6026379

FormulaC2H2

Mol. Weight26.04 g/mol

SMILESC#C

Data Sources

EPA CompTox (DSSTox) · DTXSID6026379Retrieved 2026-04-06
PubChem · compound 6326Retrieved 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

Ethyne (CAS 74-86-2) https://chemicalindependence.com/chemical/74-86-2/ EPA CompTox (DSSTox): DTXSID6026379. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID6026379 PubChem: 6326. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/6326 EPA Chemical Data Reporting: 74-86-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 74-86-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290129 for CAS 74-86-2. Reporting year: 2024. https://usatrade.census.gov/