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Sirius supra blue fgl-CF stain

CAS 6527-70-4

2,9-Triphenodioxazinedisulfonic acid, 6,13-dichloro-3,10-bis(phenylamino)-, sodium salt (1:2)

EPA and Census publish no US supply data for this chemical.

Molecular structure of 6527-70-4
2 Na⁺
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 unknown

Where 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.

Chemical Identity

CAS6527-70-4
PubChem CIDNot recorded
DTXSIDDTXSID10889560
FormulaC30H16Cl2N4Na2O8S2
Mol. Weight741.48 g/mol
SMILES[Na+].[Na+].[O-]S(=O)(=O)C1=CC2=C(OC3=C(Cl)C4=NC5=CC(=C(NC6=CC=CC=C6)C=C5OC4=C(Cl)C3=N2)S([O-])(=O)=O)C=C1NC1=CC=CC=C1

Data Sources

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Brief citations

Sirius supra blue fgl-CF stain (CAS 6527-70-4) https://chemicalindependence.com/chemical/6527-70-4/ EPA TSCA Inventory: CAS 6527-70-4. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory