Benzenesulfonic acid, 3,3'-carbonylbis[4-hydroxy-6-methoxy-, sodium salt (1:2)
CAS 76656-36-5
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
$2.94/gCombi-Blocks, Inc.
CountryUnited States
Pack$1470.00 / 500 g
Purity98%
Vendors6 available
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
5 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 |
|---|---|---|---|---|
| AK Scientific Specialized | United States | $4.90 | 100 g | 95% |
| AK Scientific, Inc. | United States | $6.72 | 100 g | 98% |
| Key Organics Ltd. | United Kingdom | $2740.00 | 50 mg | 98% |
| Sigma-Aldrich (Rush Stock) | Germany | $6615.60 | 25 mg | — |
| Sigma-Aldrich | Germany | $6615.60 | 25 mg | — |
Chemical Identity
CAS76656-36-5
PubChem CIDNot recorded
DTXSIDDTXSID20890384
FormulaC15H12Na4O11S2
Mol. Weight524.33 g/mol
SMILES[Na+].[Na+].[Na+].[Na+].COC1=C(C=C(C(=O)C2=CC(=C(OC)C=C2O)S([O-])(=O)=O)C(O)=C1)S([O-])(=O)=O
Data Sources
- EPA TSCA InventoryRetrieved 2026-10-04
Brief citations
Benzenesulfonic acid, 3,3'-carbonylbis[4-hydroxy-6-methoxy-, sodium salt (1:2) (CAS 76656-36-5) https://chemicalindependence.com/chemical/76656-36-5/ EPA TSCA Inventory: CAS 76656-36-5. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory