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