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Xanthylium, 9-[2-(ethoxycarbonyl)phenyl]-3,6-bis(ethylamino)-2,7-dimethyl-, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[2-(4-sulfophenyl)diazenyl]-1H-pyrazole-3-carboxylate (3:1)

CAS 65138-66-1

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

Molecular structure of 65138-66-1
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

CAS65138-66-1
PubChem CIDNot recorded
DTXSIDDTXSID40890927
FormulaC100H102N10O18S2
Mol. Weight1796.09 g/mol
SMILES[O-]C(=O)C1=NN(C(=O)C1N=NC1=CC=C(C=C1)S([O-])(=O)=O)C1=CC=C(C=C1)S([O-])(=O)=O.CCNC1=CC2=[O+]C3=C(C=C(C)C(NCC)=C3)C(=C2C=C1C)C1=C(C=CC=C1)C(=O)OCC.CCNC1=CC2=[O+]C3=C(C=C(C)C(NCC)=C3)C(=C2C=C1C)C1=C(C=CC=C1)C(=O)OCC.CCNC1=CC2=[O+]C3=C(C=C(C)C(NCC)=C3)C(=C2C=C1C)C1=C(C=CC=C1)C(=O)OCC

Data Sources

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Brief citations

Xanthylium, 9-[2-(ethoxycarbonyl)phenyl]-3,6-bis(ethylamino)-2,7-dimethyl-, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[2-(4-sulfophenyl)diazenyl]-1H-pyrazole-3-carboxylate (3:1) (CAS 65138-66-1) https://chemicalindependence.com/chemical/65138-66-1/ EPA TSCA Inventory: CAS 65138-66-1. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory