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Congo red

C₃₂H₂₂N₆Na₂O₆S₂ · 70 atoms

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Congo red

Elements

CCarbon NNitrogen SSulfur OOxygen NaSodium HHydrogen

About

Congo Red is an indicator dye that is blue-violet at pH 3.0 and red at pH 5.0. It contains a 3,3'-(biphenyl-4,4'-diyldidiazene-2,1-diyl)bis(4-aminonaphthalene-1-sulfonate). It is functionally related to a 3,3'-(biphenyl-4,4'-diyldidiazene-2,1-diyl)bis(4-aminonaphthalene-1-sulfonic acid).

Properties

IUPAC namedisodium;4-amino-3-[[4-[4-[(1-amino-4-sulfonatonaphthalen-2-yl)diazenyl]phenyl]phenyl]diazenyl]naphthalene-1-sulfonate

CAS number573-58-0

Molar mass696.7 g/mol

Sources

Properties: PubChem CID 11313
3D structure: RDKit ETKDGv3 (from PubChem CID 11313 SMILES)
CAS number: PubChem CID 11313
Description: PubChem ← ChEBI

Data from PubChem (NIH/NLM). Some annotations originate with the upstream sources shown.