Methsuximide

Drug ingredient

CAS 77-41-8

This chemical is an active pharmaceutical ingredient used in FDA-regulated drugs.

US productionNot reported

Import value, 2024$43M

Top sourceJapan 25%

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 292519 · basket

These shares come from HS customs code 292519, which covers 43 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).

JP 25%JapanCN 21%ChinaGB 21%United KingdomAT 14%AustriaDE 7%Germany

Australia
Belgium
Israel
Switzerland
Hungary
Ukraine
Slovakia
Singapore

3 FDA-registered drug labelers

ANI Pharmaceuticals, Inc.

NURAY CHEMICALS PRIVATE LIMITED

Parke-Davis Div of Pfizer Inc

Why It Matters

Sectors

Health

Downstream Uses

Appears in 2 drug and cosmetic product listings (FDA).

•Celontin
•Methsuximide

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

Vendor Pricing

$693.00/gAstaTech (2 weeks)

CountryUnited States

Pack$693.00 / 1 g

Purity95%

Vendors11 available

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

10 more vendors

Vendor	Country	$/g	Pack	Purity
Aaron Chemicals LLC	Hong Kong	$1384.00	500 mg	98%
Angene Chemical	China → Hong Kong	$1394.00	500 mg	98%
Fulfilled by Molport	Latvia	$1640.00	50 mg	98%
A2B Chem LLC	United States	$1842.00	500 mg	98%
AA BLOCKS	United States	$2418.00	500 mg	98%
TargetMol Chemicals	China → United States	$2920.00	25 mg	99.85%
Cayman Europe	Estonia	$3927.00	100 mg	98%
MedChemExpress MCE	Sweden	$4501.20	25 mg	99.68%
MedKoo Biosciences, Inc	United States	$6600.00	100 mg	98%
Angene International Limited	United States	$8920.00	25 mg	98%

Chemical Identity

CAS77-41-8

PubChem CID6476

DTXSIDDTXSID5023293

FormulaC12H13NO2

Mol. Weight203.24 g/mol

SMILESCC1(CC(=O)N(C1=O)C)C2=CC=CC=C2

Data Sources

PubChem · compound 6476Retrieved 2026-04-07
FDA National Drug Code directoryRetrieved 2026-04-25
FDA National Drug Code directoryRetrieved 2026-04-07
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

Methsuximide (CAS 77-41-8) https://chemicalindependence.com/chemical/77-41-8/ PubChem: 6476. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/6476 FDA National Drug Code directory: CAS 77-41-8. Retrieved 2026-04-25. https://open.fda.gov/data/ndc/ FDA National Drug Code directory: bulk match. Retrieved 2026-04-07. https://open.fda.gov/data/ndc/ US Census international trade: HS 292519 for CAS 77-41-8. Reporting year: 2024. https://usatrade.census.gov/