Question

what is the use of safranin in bio​

Answer 1

Safranin is used as a counterstain in some staining protocols, colouring all cell nuclei red. This is the classic counterstain in both Gram stains, and endospore staining. It can also be used for the detection of cartilage, mucin and mast cell granules.

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Answer 2

safranin (also safranin 0 or basic red 2) is a biological stain used in histology and cytology.