2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-[2-(2-hydroxy-4-sulfo-1-naphthalenyl)diazenyl]-, sodium salt (1:3)
CAS 63451-35-4
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
$5.40/gAA BLOCKS
CountryUnited States
Pack$540.00 / 100 g
PurityNot recorded
Vendors3 available
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
2 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 | $8.92 | 25 g | — |
| TargetMol Chemicals | China → United States | $218.00 | 500 mg | — |
Chemical Identity
CAS63451-35-4
PubChem CIDNot recorded
DTXSIDDTXSID8069852
FormulaC20H11N2Na3O11S3
Mol. Weight620.46 g/mol
SMILES[Na+].[Na+].[Na+].OC1=C(N=NC2=C3C=CC(=CC3=CC(=C2O)S([O-])(=O)=O)S([O-])(=O)=O)C2=CC=CC=C2C(=C1)S([O-])(=O)=O
Data Sources
- EPA TSCA InventoryRetrieved 2026-10-04
Brief citations
2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-[2-(2-hydroxy-4-sulfo-1-naphthalenyl)diazenyl]-, sodium salt (1:3) (CAS 63451-35-4) https://chemicalindependence.com/chemical/63451-35-4/ EPA TSCA Inventory: CAS 63451-35-4. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory