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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.
Congo Red 4B, Cosmos Red, Cotton Red B, Cotton Red C, Direct Red 28, Direct Red R, Direct Red Y

COAs

Packings

25 g (00025)

100 g (00100)

1000 g (01000)

1PB1200060 1PB1200200
Print friendly version
Article No. 02930 Grade For Microscopy
Purity CAS No. 573-58-0
Molecular Formula C32H22N6Na2O6S2 Molecular Weight 696.65
H.S. Code 3204.1421 Shelf Life 60 Months

Physical Properties

Physical state at 20 °C Solid Colour Brownish red powder
Odour Odorless pH value 8-9.5
Solubility in water [% weight] Soluble in water

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

Safety Information and Hazard Symbols

Health Hazard
Symbol: GHS08
 Signal Word: Danger
 Hazardous Statement: H350-H361d
 Precaution Statement: P201-P281-P308 + P313
Revision Date: 28-Sep-2016

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