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Zileuton

Drug ingredient

CAS 111406-87-2

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

Molecular structure of 111406-87-2
US productionNot reported
Import value, 2024$6.4B
Top sourceSingapore 36%

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 293499 · basket

These shares come from HS customs code 293499, which covers 575 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
SG 36%SingaporeIE 23%IrelandCN 11%ChinaCH 6%SwitzerlandIN 5%India
14 FDA-registered drug labelers
Apicore Pharmaceuticals Private Limited
Camber Pharmaceuticals, Inc.
Chiesi USA, Inc.
Emcure Pharmaceuticals Limited
Erregierre SpA
Golden State Medical Supply, Inc.
MSN Laboratories Private Limited
NorthStar RxLLC
Optimus Drugs Private Limited
Rising Pharma Holdings, Inc.
Sionc Pharmaceutical Private Limited
Solara Active Pharma Sciences Limited
Sterling Pharma Solutions Limited
Strides Pharma Science Limited

Why It Matters

Sectors
Health
Downstream Uses

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

  • •Zileuton
  • •Zyflo
FDA Shortage Status
No FDA shortage records

Vendor Pricing

$9.00/gBLD Pharmatech GmbH
CountryGermany
Pack$900.00 / 100 g
Purity97%
Vendors31 available

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

30 more vendors
VendorCountry$/gPackPurity
BLD Pharmatech Ltd.China$9.00100 g97%
Combi-Blocks, Inc.United States$9.00100 g98%
A2B Chem LLCUnited States$9.54100 g97%
AA BLOCKSUnited States$10.07100 g97%
AK Scientific SpecializedUnited States$12.0025 g95%
Aaron Chemicals LLCHong Kong$12.33100 g97%
AstaTech, IncUnited States$13.0025 g98%
Angene ChemicalChina → Hong Kong$14.11100 g97%
Ambeed, Inc.United States$15.2825 g97%
AK Scientific, Inc.United States$15.9625 g98%
Angene International LimitedUnited States$25.9225 g98%
BLD Pharmatech Co., LimitedUnited States$51.001 g97%
InterbioscreenHong Kong$75.0010 g95%
MedKoo Biosciences, IncUnited States$110.005 g98%
TargetMol ChemicalsChina → United States$418.00500 mg99.86%
TargetMol Chemicals EUAustria$635.00200 mg99.86%
MolnovaChina$844.00500 mg99%
Fulfilled by MolportLatvia$900.0010 mg98%
Apexbio Technology LLCUnited States$1000.00100 mg99.79%
Sigma-Aldrich (Rush Stock)Germany$1236.50200 mg—
Sigma-AldrichGermany$1236.50200 mg—
MedChemExpress MCESweden$2855.60100 mg99.86%
Axon MedchemNetherlands$2880.0050 mg99%
Princeton BioMolecular Research (SC)United States$2900.00100 mg90%
Vitas M Chemical LimitedHong Kong$3170.00100 mg90%
AngeneChina → Hong Kong$4266.6730 mg97%
Cayman EuropeEstonia$4974.2050 mg98%
WuXi AppTec (Hong Kong) LimitedChina → Hong Kong$6960.0025 mg98.5%
CliniSciences GmbHSwitzerland$7095.0010 mg99%
Key Organics Ltd.United Kingdom$8500.0010 mg97%

Chemical Identity

CAS111406-87-2
PubChem CID60490
DTXSIDDTXSID9023752
FormulaC11H12N2O2S
Mol. Weight236.29 g/mol
SMILESCC(C1=CC2=CC=CC=C2S1)N(C(=O)N)O

Data Sources

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Brief citations

Zileuton (CAS 111406-87-2) https://chemicalindependence.com/chemical/111406-87-2/ PubChem: 60490. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/60490 FDA National Drug Code directory: CAS 111406-87-2. 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 293499 for CAS 111406-87-2. Reporting year: 2024. https://usatrade.census.gov/