Lexic.us

Definition of Congo red

1. Noun. A red-brown azo dye especially as a chemical pH indicator (congo red is red in basic and blue in acidic solutions).

Medical Definition of Congo red

1. An odourless, dark red or reddish brown powder which decomposes on exposure to acid fumes. It is used as a diagnostic aid in amyloidosis, and has been used as an antihemolytic and detoxicant. Pharmacological action: dyes. Chemical name: 1-Naphthalenesulfonic acid, 3,3'-((1,1'-biphenyl)-4,4'-diylbis(azo))bis(4-amino-, disodium salt (12 Dec 1998)

Lexicographical Neighbors of Congo Red

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