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C.I. Direct Red 227

CAS 17791-81-0

2,7-Naphthalenedisulfonic acid, 4,4'-[1,2-ethenediylbis[(3-sulfo-4,1-phenylene)imino[6-(4-morpholinyl)-1,3,5-triazine-4,2-diyl]imino]]bis[5-hydroxy-6-(2-phenyldiazenyl)-, sodium salt (1:6)

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

Molecular structure of 17791-81-0
6 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

CAS17791-81-0
PubChem CIDNot recorded
DTXSIDDTXSID50889665
FormulaC60H46N16Na6O22S6
Mol. Weight1673.42 g/mol
SMILES[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].OC1=C(N=NC2=CC=CC=C2)C(=CC2=CC(=CC(NC3=NC(NC4=CC=C(C=CC5=CC=C(NC6=NC(=NC(NC7=C8C(O)=C(N=NC9=CC=CC=C9)C(=CC8=CC(=C7)S([O-])(=O)=O)S([O-])(=O)=O)=N6)N6CCOCC6)C=C5S([O-])(=O)=O)C(=C4)S([O-])(=O)=O)=NC(=N3)N3CCOCC3)=C12)S([O-])(=O)=O)S([O-])(=O)=O

Data Sources

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Brief citations

C.I. Direct Red 227 (CAS 17791-81-0) https://chemicalindependence.com/chemical/17791-81-0/ EPA TSCA Inventory: CAS 17791-81-0. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory