1H-Indole-3-butanoic acid
CAS 133-32-4
This chemical is listed as active in US commerce, but no company reported it to EPA’s survey for 2019 or 2023. Sites may have made or imported less than the threshold amount, or none.
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 293399 · basket
These shares come from HS customs code 293399, which covers 518 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.
- Taiwan
- Poland
- Canada
- Ivory Coast
- Greece
- Hungary
- Indonesia
- Latvia
- Belgium
- Slovakia
- Czech Republic
- Austria
- Netherlands
- Finland
- Denmark
- Croatia
- Australia
- South Africa
- Sweden
- Hong Kong
- Malta
- Singapore
- Lithuania
- Malaysia
- Oman
- Serbia
Why It Matters
No EPA sector or FDA product records name a use for this chemical.
Vendor Pricing
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
32 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 |
|---|---|---|---|---|
| Manchester Organics | United Kingdom | $0.14 | 1 kg | 97% |
| A2B Chem LLC | United States | $0.21 | 500 g | 98% |
| AA BLOCKS | United States | $0.28 | 500 g | 98% |
| Combi-Blocks, Inc. | United States | $0.28 | 1 kg | 98% |
| AK Scientific Specialized | United States | $0.28 | 1 kg | 95% |
| Fluorochem UK | United Kingdom | $0.36 | 500 g | 97% |
| AK Scientific, Inc. | United States | $0.39 | 1 kg | 98% |
| Key Organics Ltd. | United Kingdom | $0.81 | 100 g | 95% |
| Apollo Scientific US | United Kingdom | $1.56 | 25 g | 98% |
| Apexbio Technology LLC | United States | $2.20 | 50 g | 99.8% |
| Aldlab | United States | $2.76 | 5 g | 95% |
| AstaTech (2 weeks) | United States | $3.08 | 25 g | 95% |
| Angene International Limited | United States | $3.28 | 25 g | 98% |
| ALFA AESAR | Germany | $5.26 | 100 g | 98% |
| MedChemExpress MCE | Sweden | $6.29 | 10 g | 99.95% |
| Fluorochem EU | Germany | $9.68 | 1 g | 97% |
| Sigma-Aldrich (Rush Stock) | Germany | $12.33 | 100 g | 99% |
| Sigma-Aldrich | Germany | $12.33 | 100 g | 99% |
| MedKoo Biosciences, Inc | United States | $18.00 | 25 g | 98% |
| ChemDiv, Inc. | United States | $31.20 | 25 g | 90% |
| Interbioscreen | Hong Kong | $64.50 | 10 g | 95% |
| Vitas M Chemical Limited | Hong Kong | $136.00 | 5 g | 90% |
| Labotest KG | Germany | $217.80 | 5000 mg | 90% |
| Cayman Europe | Estonia | $380.80 | 100 mg | 98% |
| HTS Biochemie Innovationen | Germany | $400.00 | 1 g | 95% |
| Maybridge, Ltd. | United Kingdom | $2414.30 | 100 mg | 90% |
| Eximed | Ukraine | $2680.00 | 50 mg | 90% |
| Otava, Ltd. (2 weeks) | Ukraine | $2724.00 | 50 mg | 90% |
| Princeton BioMolecular Research (SC) | United States | $2900.00 | 100 mg | 90% |
| Angene | China → Hong Kong | $4266.67 | 30 mg | 97% |
| Molnova | China | $9000.00 | 25 mg | 99% |
| TimTec, LLC | United States | $13333.33 | 30 mg | 90% |
Chemical Identity
Data Sources
- EPA TSCA InventoryRetrieved 2026-10-04
- US Census international tradeReporting year: 2024 · Retrieved 2026-10-04
Brief citations
1H-Indole-3-butanoic acid (CAS 133-32-4) https://chemicalindependence.com/chemical/133-32-4/ EPA TSCA Inventory: CAS 133-32-4. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 293399 for CAS 133-32-4. Reporting year: 2024. https://usatrade.census.gov/