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Butanoic acid, 1-methylethyl ester

CAS 638-11-9

Molecular structure of 638-11-9
US productionNot reported
Import value, 2024$63M
Top sourceChina 22%

This chemical is not on EPA’s Toxic Substances Control Act inventory, the list behind EPA’s production survey.

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 291560 · basket

These shares come from HS customs code 291560, which covers 183 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CN 22%ChinaDE 19%GermanySE 14%SwedenJP 13%JapanIN 9%India

Why It Matters

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

Chemical Identity

CAS638-11-9
PubChem CIDNot recorded
DTXSIDDTXSID5075288
FormulaC7H14O2
Mol. Weight130.187 g/mol
SMILESCCCC(=O)OC(C)C

Data Sources

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Brief citations

Butanoic acid, 1-methylethyl ester (CAS 638-11-9) https://chemicalindependence.com/chemical/638-11-9/ EPA CompTox (DSSTox): 638-11-9. Retrieved 2026-04-29. https://comptox.epa.gov/dashboard/chemical/details/DTXSID5075288 US Census international trade: HS 291560 for CAS 638-11-9. Reporting year: 2024. https://usatrade.census.gov/