Squaric acid dibutyl ester
Drug ingredientCAS 2892-62-8
This chemical is an active pharmaceutical ingredient used in FDA-regulated drugs.
US productionNot reported
Top sourceNo public record
This chemical is not on EPA’s Toxic Substances Control Act inventory, the list behind EPA’s production survey.
Why supply is unknownWhere It Comes From
EPA and Census publish no US supply data for this chemical.
1 FDA-registered drug labeler
MAHI DRUGS PRIVATE 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."
No FDA shortage records
Vendor Pricing
$1.59/gAaron Chemicals LLC
CountryHong Kong
Pack$159.00 / 100 g
Purity97%
Vendors23 available
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
22 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 |
|---|---|---|---|---|
| Angene Chemical | China → Hong Kong | $1.72 | 100 g | 97% |
| Combi-Blocks, Inc. | United States | $2.25 | 100 g | 98% |
| A2B Chem LLC | United States | $2.40 | 25 g | 98% |
| AA BLOCKS | United States | $2.57 | 100 g | 98% |
| Fluorochem EU | Germany | $2.90 | 25 g | 97% |
| Chemscene | United States | $3.47 | 100 g | — |
| BLD Pharmatech GmbH | Germany | $3.63 | 100 g | 98% |
| BLD Pharmatech Ltd. | China | $3.63 | 100 g | 98% |
| Ambeed, Inc. | United States | $3.63 | 100 g | 98% |
| BLD Pharmatech Co., Limited | United States | $3.64 | 25 g | 98% |
| AK Scientific Specialized | United States | $3.80 | 25 g | 95% |
| Synthonix | United States | $4.30 | 100 g | 95% |
| MedChemExpress MCE | Sweden | $4.33 | 100 g | — |
| AK Scientific, Inc. | United States | $5.32 | 25 g | 98% |
| Apollo Scientific UK | United Kingdom | $5.35 | 100 g | 98% |
| Angene International Limited | United States | $7.28 | 25 g | 95% |
| AstaTech, Inc | United States | $12.84 | 25 g | 98% |
| Sigma-Aldrich (Rush Stock) | Germany | $19.39 | 25 g | 98% |
| Sigma-Aldrich | Germany | $19.39 | 25 g | 98% |
| ALFA AESAR | Germany | $20.50 | 5 g | 97% |
| MedKoo Biosciences, Inc | United States | $90.00 | 5 g | 98% |
| Angene | China → Hong Kong | $4266.67 | 30 mg | 97% |
Chemical Identity
CAS2892-62-8
PubChem CID65108
DTXSIDDTXSID30183113
FormulaC12H18O4
Mol. Weight226.27 g/mol
SMILESCCCCOC1=C(C(=O)C1=O)OCCCC
Data Sources
- PubChem · compound 65108Retrieved 2026-04-07
- FDA National Drug Code directoryRetrieved 2026-04-25
- FDA National Drug Code directoryRetrieved 2026-04-07
Brief citations
Squaric acid dibutyl ester (CAS 2892-62-8) https://chemicalindependence.com/chemical/2892-62-8/ PubChem: 65108. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/65108 FDA National Drug Code directory: CAS 2892-62-8. 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/