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Lab Chemical

CONGO RED INDICATOR FOR MICROSCOPY

Product code RXSOL-60-6604-351

CONGO RED INDICATOR FOR MICROSCOPY

Description
Congo red is used for staining in amyloidosis, and for the cell walls of plants and fungi, 
and for the outer membrane of Gram-negative bacteria.
 Apple-green birefringence of Congo red stained preparations under polarized light is indicative of the presence of amyloid fibrils.
Application
Application

Congo Red is the sodium salt of benzidinediazo-bis-1-naphthylamine-4-sulfonic acid; a diazo dye that is red in alkaline solution and blue in acid solution and used especially as an indicator and as a biological stain. Congo Red is an indicator dye that is blue-violet at pH 3.0 and red at pH 5.0.

Precautions
Precautions