tert-Amyl methyl ether

CAS 994-05-8

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$117M

Import volumeZero

Top sourceIndia 29%

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 290919 · basket

EPA reports by year

2023: US production Confidential · Imports Zero
2019: US production Confidential · Imports 156.0M lb

These shares come from HS customs code 290919, which covers 93 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).

IN 29%IndiaCN 25%ChinaJP 20%JapanBR 6%BrazilDE 4%Germany

South Korea
Singapore
Spain
United Arab Emirates
Netherlands
Belgium
Indonesia
Poland
Mexico
Taiwan
Slovakia

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.

Shell Petroleum

Why It Matters

Sectors

Energy

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 agents in Petroleum Refineries (100%)Processing as a reactant

Chemical Identity

CAS994-05-8

PubChem CID61247

DTXSIDDTXSID8024521

FormulaC6H14O

Mol. Weight102.17 g/mol

SMILESCCC(C)(C)OC

Data Sources

EPA CompTox (DSSTox) · DTXSID8024521Retrieved 2026-04-06
PubChem · compound 61247Retrieved 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

tert-Amyl methyl ether (CAS 994-05-8) https://chemicalindependence.com/chemical/994-05-8/ EPA CompTox (DSSTox): DTXSID8024521. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID8024521 PubChem: 61247. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/61247 EPA Chemical Data Reporting: 994-05-8. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 994-05-8. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290919 for CAS 994-05-8. Reporting year: 2024. https://usatrade.census.gov/