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CONGO RED INDICATOR For Microscopy

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

Synonyms : Congo Red 4B, Cosmos Red, Cotton Red B, Cotton Red C, Direct Red 28, Direct Red R, Direct Red Y
Chemical Information
ID 1552
Article No. AL1480
Grade For Microscopy
Purity
CAS Number 573-58-0
Molecular Formula C32H22N6Na2O6S2
Molecular Weight 696.65
HS Code 32041421
Shelf Life 5 Years
Packings Price (Rupee) Price (Dollar)
25 gm
150
$ 3
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100 gm
470
$ 8
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500 gm
1870
$ 31
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Chemical Structure
Physical Properties
Solubility in water [% weight] Soluble in water
Colour Brownish red powder
pH value 8-9.5
Odour Odorless
Physical state at 20 degree C Solid
Safety Information and Hazard Symbols
Signal Word Danger
Precaution Statement P201-P281-P308 + P313
Symbol GHS08
Hazardous Statement H350-H361d
Specifications
Sensitivity test Passes test
Loss on drying at 110 degree C Max 5.0%
Appearance of solution (1.0 g/l; water) almost clear to slightly turbid , red solution
Appearance Brownish red powder
Transition range at pH 3.0 to pH 5.2 Violet to orange red