CONGO RED INDICATOR

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

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

MSDS

Certificate of Analysis (COAs)

Physical state at 20 °C

Solid

Colour

Brownish red powder

Odour

Odorless

pH value

8-9.5

Solubility in water [% weight]

Soluble in water

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

Symbol: GHS08
Signal Word: Danger
Hazardous Statement: H350-H361d
Precaution Statement: P201-P281-P308 + P313

Revision Date : 28-Sep-2016