CONGO RED INDICATOR For Microscopy

Short Name: CONGO RED INDICATOR

Other Names: Congo Red 4B, Cosmos Red, Cotton Red B, Cotton Red C, Direct Red 28, Direct Red R, Direct Red Y

C.I.No.22120Congo red is used to stain microscopic preparates, especially as a cytoplasm and erythrocyte stain.

Chemical Specifications

Appearance : Brownish red powder

Appearance of solution (1.0 g/L; water) : almost clear to slightly turbid , red solution

Transition range at pH 3.0 to pH 5.2 : Violet to orange red

Loss on drying (at 110°C) : Max 5.0%

Sensitivity test : Passes test