Isocarboxazid

Drug ingredientActive Shortage

CAS 59-63-2

This drug ingredient is in active FDA shortage. At least one manufacturer cannot meet demand.

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

Country of origin for US imports, from Census customs data (2024).

SG 36%SingaporeIE 23%IrelandCN 11%ChinaCH 6%SwitzerlandIN 5%India

Finland
Netherlands
Canada
Indonesia
Mexico
Taiwan
South Korea
Austria
Croatia
Sweden
Ukraine
Denmark
Israel
Czech Republic
New Zealand
Hong Kong
Kyrgyzstan
Australia
Portugal
South Africa
Poland
Slovenia
Brazil
Slovakia
Vietnam
Latvia
Malta
Hungary
Romania
Kenya
Belarus
Russia
Turkey
Norway

1 FDA-registered drug labeler

Piramal Healthcare (Canada) Limited

Why It Matters

Sectors

Health

Downstream UsesNot recorded

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."

Active Shortage

Shortage History

Rows group FDA shortage filings by drug product. Each manufacturer makes its own FDA shortage filing, so one product can carry several reports at once: Available, Limited Availability, Unavailable or to be discontinued.

Current shortage
Isocarboxazid Tablet
Shortage listed since April 16, 2026
Manufacturer reports: 1 unavailable

See all current drug shortages

Vendor Pricing

$1590.00/gMolnova

CountryChina

Pack$795.00 / 500 mg

Purity99%

Vendors13 available

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

12 more vendors

Vendor	Country	$/g	Pack	Purity
TargetMol Chemicals	China → United States	$1766.00	500 mg	99.94%
Aaron Chemicals LLC	Hong Kong	$2256.00	500 mg	95%
Angene Chemical	China → Hong Kong	$2270.00	500 mg	95%
A2B Chem LLC	United States	$2950.00	100 mg	99.94%
AA BLOCKS	United States	$3270.00	100 mg	98%
Combi-Blocks (back-ordered)	United States	$3820.00	250 mg	95%
TargetMol Chemicals EU	Austria	$3890.00	100 mg	99.94%
Cayman Europe	Estonia	$4688.60	100 mg	98%
MedChemExpress MCE	Sweden	$7865.00	50 mg	98.94%
Angene International Limited	United States	$11360.00	50 mg	98%
MedKoo Biosciences, Inc	United States	$18000.00	25 mg	98%
AstaTech (2 weeks)	United States	$23800.00	5 mg	95%

Chemical Identity

CAS59-63-2

PubChem CID3759

DTXSIDDTXSID4023171

FormulaC12H13N3O2

Mol. Weight231.25 g/mol

SMILESCC1=CC(=NO1)C(=O)NNCC2=CC=CC=C2

Data Sources

PubChem · compound 3759Retrieved 2026-04-07
FDA National Drug Code directoryRetrieved 2026-04-25
FDA Drug ShortagesRetrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

Isocarboxazid (CAS 59-63-2) https://chemicalindependence.com/chemical/59-63-2/ PubChem: 3759. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/3759 FDA National Drug Code directory: CAS 59-63-2. Retrieved 2026-04-25. https://open.fda.gov/data/ndc/ FDA Drug Shortages: CAS 59-63-2. Retrieved 2026-10-04. https://www.accessdata.fda.gov/scripts/drugshortages/ US Census international trade: HS 293499 for CAS 59-63-2. Reporting year: 2024. https://usatrade.census.gov/