Methylene Blue
Bottle green crystal or crystalline powder，with gunmetal shine，without smell，solve in water、ethanol and chloroform，insolve in aether，water liquor is blue。
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Eosin Y(water solution ) | With blue-light red crystal or plam red powder，easy solve in water,decline solve in alcohol,insolve in aether。 |
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Xylenol orange | Red,palm,crystalloid,powder,easy deliquescence,solve in water ,insolve in alcohol。 |
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Fluorescein sodium | Orange-red crystal，solve in water ， decline solve alcohol. |
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Phenolphthaleinum | White or light yellow thin little crystal，solve in alcohol、aether,decline solve in chloroform,insolve in water，melting point258-262℃。 |
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Semixylenol orange | Orange yellow powder, water solution is mauve, insolve in alcohol. |
