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Primidone

Drug ingredient

CAS 125-33-7

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

Molecular structure of 125-33-7
US productionNot reported
Import value, 2024$907M
Top sourceIreland 47%

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 293379 · basket

These shares come from HS customs code 293379, which covers 105 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
IE 47%IrelandBE 19%BelgiumSG 11%SingaporeIT 4%ItalyCH 4%Switzerland
27 FDA-registered drug labelers
Actavis Pharma, Inc.
Advagen Pharma Limited
American Health Packaging
Amneal Pharmaceuticals LLC
Amneal Pharmaceuticals of New York LLC
Aphena Pharma Solutions - Tennessee, LLC
AvKARE
AvPAK
Azico Biophore India Private Limited
Bausch Health US, LLC
Bryant Ranch Prepack
Carnegie Pharmaceuticals LLC
Chartwell RX, LLC
DIRECT RX
Dr. Reddy's Laboratories Limited
Golden State Medical Supply, Inc
Lannett Company, Inc.
Nantong Jinghua Pharmaceutical Co., Ltd.
NCS HealthCare of KY, LLC dba Vangard Labs
NorthStar Rx LLC
Oxford Pharmaceuticals, LLC
PD-Rx Pharmaceuticals, Inc.
Proficient Rx LP
Siegfried (Nantong) Pharmaceuticals Co, Ltd
Siegfried AG
Spectrum Laboratory Products, Inc.
TruPharma LLC.

Why It Matters

Sectors
Health
Downstream Uses

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

  • •Primidone
  • •Mysoline
FDA Shortage Status
No FDA shortage records

Vendor Pricing

$1.31/gAaron Chemicals LLC
CountryHong Kong
Pack$131.00 / 100 g
Purity98%
Vendors22 available

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

21 more vendors
VendorCountry$/gPackPurity
Angene ChemicalChina → Hong Kong$1.34100 g98%
A2B Chem LLCUnited States$3.6025 g98%
AA BLOCKSUnited States$4.6025 g98%
Fulfilled by MolportLatvia$5.001 g98%
AK Scientific, Inc.United States$5.7225 g98%
Angene International LimitedUnited States$10.2025 g98%
Sigma-Aldrich (Rush Stock)Germany$15.185 g—
Sigma-AldrichGermany$15.185 g—
MedKoo Biosciences, IncUnited States$47.5020 g98%
TargetMol Chemicals USUnited States$148.00500 mg99.91%
AstaTech, IncUnited States$178.001 g99%
AK Scientific SpecializedUnited States$278.001 g99%
TargetMol ChemicalsChina → United States$330.00100 mg99.91%
CliniSciences GmbHSwitzerland$348.30100 mg99%
MolnovaChina$370.00100 mg99%
Labotest KGGermany$453.001000 mg90%
MedChemExpress MCESweden$496.10100 mg99.96%
Apexbio Technology LLCUnited States$630.00100 mg99.59%
AngeneChina → Hong Kong$4266.6730 mg98%
Key Organics Ltd.United Kingdom$6900.0010 mg97%
TimTec, LLCUnited States$9333.3330 mg90%

Chemical Identity

CAS125-33-7
PubChem CID4909
DTXSIDDTXSID7023510
FormulaC12H14N2O2
Mol. Weight218.25 g/mol
SMILESCCC1(C(=O)NCNC1=O)C2=CC=CC=C2

Data Sources

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Brief citations

Primidone (CAS 125-33-7) https://chemicalindependence.com/chemical/125-33-7/ PubChem: 4909. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/4909 FDA National Drug Code directory: CAS 125-33-7. 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 293379 for CAS 125-33-7. Reporting year: 2024. https://usatrade.census.gov/