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
Product Code. |
00844 |
Grade |
|
Purity |
CAS No. |
573-58-0 | |
Molecular Formula |
C32H22N6Na2O6S2 |
Molecular Weight |
696.65 |
H.S.Code |
3204.14210 |
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 |
Packaging
Specification
| 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 dryig (at 110°C) | Max 5.0% |
| Sensitivity test | Passes test |
Safety Information and Hazard Symbols
Symbol: GHS08
Signal Word: Danger
Hazardous Statement: H350-H361d
Precaution Statement: P201-P281-P308 + P313