Ethionamide
Drug ingredientCAS 536-33-4
This chemical is an active pharmaceutical ingredient used in FDA-regulated drugs.
This chemical is not on EPA’s Toxic Substances Control Act inventory, the list behind EPA’s production survey.
Why supply is unknownProduction 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 293339 · basket
These shares come from HS customs code 293339, which covers 397 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.
- Taiwan
- Ukraine
- Sweden
- Argentina
- Canada
- Finland
- Malta
- Israel
- Netherlands
- Denmark
- United Arab Emirates
- Mexico
- Brunei
- Slovakia
- Australia
- South Africa
- Poland
- Latvia
- Lithuania
- Estonia
- Slovenia
- Czech Republic
- Croatia
- Hong Kong
1 FDA-registered drug labeler
Why It Matters
- to be discontinued
Ethionamide Tablet
Shortage listed since July 16, 2025
Vendor Pricing
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
25 more vendors
| Vendor | Country Supplier country. Where available, shows shipping origin. When the supplier ships from a different country than where they are registered, both are shown. Most suppliers show registration country only. | $/g | Pack | Purity |
|---|---|---|---|---|
| Aaron Chemicals LLC | Hong Kong | $1.29 | 100 g | 98% |
| Angene Chemical | China → Hong Kong | $1.39 | 100 g | 98% |
| AA BLOCKS | United States | $1.48 | 25 g | 98% |
| BLD Pharmatech Co., Limited | United States | $1.83 | 100 g | 98% |
| BLD Pharmatech GmbH | Germany | $1.83 | 100 g | 98% |
| BLD Pharmatech Ltd. | China | $1.83 | 100 g | 98% |
| Ambeed, Inc. | United States | $1.83 | 100 g | 98% |
| AK Scientific Specialized | United States | $1.87 | 100 g | 95% |
| AK Scientific, Inc. | United States | $2.54 | 100 g | 98% |
| AstaTech (2 weeks) | United States | $2.56 | 25 g | 95% |
| Angene International Limited | United States | $3.23 | 100 g | 95% |
| Fluorochem EU | Germany | $8.47 | 1 g | 96% |
| Fluorochem UK | United Kingdom | $8.58 | 1 g | 96% |
| Sigma-Aldrich (Rush Stock) | Germany | $28.14 | 25 g | — |
| Sigma-Aldrich | Germany | $28.14 | 25 g | — |
| Cayman Europe | Estonia | $29.99 | 10 g | 98% |
| MedKoo Biosciences, Inc | United States | $30.00 | 25 g | 98% |
| MedChemExpress MCE | Sweden | $30.01 | 5 g | 99.98% |
| TargetMol Chemicals | China → United States | $66.00 | 1 g | 99.92% |
| Molnova | China | $73.00 | 1 g | 99% |
| Apexbio Technology LLC | United States | $76.00 | 1 g | 99.76% |
| TargetMol Chemicals EU | Austria | $155.00 | 200 mg | 99.92% |
| Labotest KG | Germany | $217.80 | 5000 mg | 90% |
| Angene | China → Hong Kong | $4266.67 | 30 mg | 98% |
| Key Organics Ltd. | United Kingdom | $6900.00 | 10 mg | 90% |
Chemical Identity
Data Sources
- PubChem · compound 2761171Retrieved 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
Brief citations
Ethionamide (CAS 536-33-4) https://chemicalindependence.com/chemical/536-33-4/ PubChem: 2761171. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/2761171 FDA National Drug Code directory: CAS 536-33-4. Retrieved 2026-04-25. https://open.fda.gov/data/ndc/ FDA Drug Shortages: CAS 536-33-4. Retrieved 2026-10-04. https://www.accessdata.fda.gov/scripts/drugshortages/ US Census international trade: HS 293339 for CAS 536-33-4. Reporting year: 2024. https://usatrade.census.gov/