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Ribavirin

Drug ingredient

CAS 36791-04-5

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

Molecular structure of 36791-04-5
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
11 FDA-registered drug labelers
Aurobindo Pharma Limited
Bausch Health US, LLC
Bryant Ranch Prepack
Cameron Pharmaceuticals
Curia Italy S.r.l.
Hahnemann Laboratories, INC.
Navinta LLC
Oceanside Pharmaceuticals
Siegfried Evionnaz SA
Zhejiang Cheng Yi Pharmaceutical Co., Ltd.
Zydus Pharmaceuticals USA Inc.

Why It Matters

Sectors
Health
Downstream Uses

Appears in 3 drug and cosmetic product listings (FDA).

  • •Ribavirin
  • •Ribavirinum
  • •Virazole
FDA Shortage Status
No FDA shortage records

Vendor Pricing

$0.16/gAaron Chemicals LLC
CountryHong Kong
Pack$82.00 / 500 g
Purity98%
Vendors33 available

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

32 more vendors
VendorCountry$/gPackPurity
Ambeed, Inc.United States$0.171 kg98%
ChemsceneUnited States$0.171 kg—
A2B Chem LLCUnited States$0.17100 g98%
Angene ChemicalChina → Hong Kong$0.18500 g98%
AA BLOCKSUnited States$0.19100 g98%
Combi-Blocks, Inc.United States$0.251 kg98%
Fluorochem EUGermany$0.28100 g98%
Apollo Scientific UKUnited Kingdom$0.58500 g—
AK Scientific SpecializedUnited States$0.63100 g95%
AK Scientific, Inc.United States$0.66500 g98%
Angene International LimitedUnited States$1.08500 g98%
AstaTech, IncUnited States$1.24100 g95%
Fulfilled by MolportLatvia$5.001 g—
Cayman EuropeEstonia$134.475 g95%
MedKoo Biosciences, IncUnited States$150.005 g98%
InterbioscreenHong Kong$170.0010 g95%
Sigma-Aldrich (Rush Stock)Germany$214.591 g—
Sigma-AldrichGermany$214.591 g—
TargetMol ChemicalsChina → United States$238.001 g99.83%
MolnovaChina$294.00500 mg99%
MedChemExpress MCESweden$496.10500 mg99.96%
Vitas M Chemical LimitedHong Kong$638.001 g90%
Axon MedchemNetherlands$1440.0050 mg100%
SpecsNetherlands$1694.0020 mg90%
CliniSciences GmbHSwitzerland$2270.4050 mg99%
Maybridge, Ltd.United Kingdom$2414.30100 mg90%
Otava, Ltd. (2 weeks)Ukraine$2724.0050 mg90%
Princeton BioMolecular Research (SC)United States$2900.00100 mg90%
AngeneChina → Hong Kong$4266.6730 mg98%
Key Organics Ltd.United Kingdom$6900.0010 mg95%
TimTec, LLC (back-ordered)United States$32000.0015 mg94%
AA BLOCKS (1 week)United States$1113000.001 mg98%

Chemical Identity

CAS36791-04-5
PubChem CID37542
DTXSIDDTXSID8023557
FormulaC8H12N4O5
Mol. Weight244.2 g/mol
SMILESC1=NC(=NN1C2C(C(C(O2)CO)O)O)C(=O)N

Data Sources

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Brief citations

Ribavirin (CAS 36791-04-5) https://chemicalindependence.com/chemical/36791-04-5/ PubChem: 37542. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/37542 FDA National Drug Code directory: CAS 36791-04-5. 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 36791-04-5. Reporting year: 2024. https://usatrade.census.gov/