[4,5'-Biisobenzofuran]-1,1',3,3'-tetrone
CAS 36978-41-3
EPA and Census publish no US supply data for this chemical.
US productionNot reported
Top sourceNo public record
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 unknownWhere It Comes From
EPA and Census publish no US supply data for this chemical.
Why It Matters
No EPA sector or FDA product records name a use for this chemical.
Vendor Pricing
$0.85/gA2B Chem LLC
CountryUnited States
Pack$426.00 / 500 g
Purity96%
Vendors16 available
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
15 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 |
|---|---|---|---|---|
| AA BLOCKS | United States | $0.95 | 100 g | 96% |
| Combi-Blocks, Inc. | United States | $0.96 | 500 g | 98% |
| Aaron Chemicals LLC | Hong Kong | $1.09 | 500 g | — |
| Angene Chemical | China → Hong Kong | $1.17 | 500 g | 98% |
| BLD Pharmatech Ltd. | China | $1.20 | 1 kg | 98% |
| Ambeed, Inc. | United States | $1.20 | 1 kg | 98% |
| BLD Pharmatech Co., Limited | United States | $1.20 | 500 g | 98% |
| BLD Pharmatech GmbH | Germany | $1.20 | 100 g | 98% |
| MedChemExpress MCE | Sweden | $1.50 | 100 g | — |
| Fluorochem EU | Germany | $1.98 | 25 g | 97% |
| Apollo Scientific US | United Kingdom | $4.44 | 25 g | — |
| AK Scientific Specialized | United States | $10.20 | 5 g | 95% |
| AK Scientific, Inc. | United States | $14.00 | 5 g | 98% |
| Angene International Limited | United States | $28.60 | 5 g | 98% |
| Angene | China → Hong Kong | $4266.67 | 30 mg | 98% |
Chemical Identity
CAS36978-41-3
PubChem CIDNot recorded
DTXSIDDTXSID1068015
FormulaC16H6O6
Mol. Weight294.218 g/mol
SMILESO=C1OC(=O)C2=C1C=CC(=C2)C1=CC=CC2=C1C(=O)OC2=O
Data Sources
- EPA TSCA InventoryRetrieved 2026-10-04
Brief citations
[4,5'-Biisobenzofuran]-1,1',3,3'-tetrone (CAS 36978-41-3) https://chemicalindependence.com/chemical/36978-41-3/ EPA TSCA Inventory: CAS 36978-41-3. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory