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The decolorizer commonly used in various staining processes, such as in microbiology or histology, is typically alcohol, such as ethanol or isopropanol, or a mixture of acetone and alcohol. In Gram staining, for instance, 95% ethanol is used to decolorize the smear after the crystal violet and iodine steps. This process helps differentiate between Gram-positive and Gram-negative bacteria based on their cell wall characteristics.

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12h ago

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It is an alchoholic compound i.e. 95% ethanol.


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The decolorizer in the process of gram staining removes the purple stain from bacteria that do not retain it, allowing them to be stained with a contrasting color. This step helps differentiate between gram-positive and gram-negative bacteria based on their cell wall composition.


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If they were old and the cell membrane had degraded, or if you used too much decolorizer.


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