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Pyronin B is a dye.Colour Index Number 45010
P 2805 (OTTO) Pyronin B Cas 2150-48-3 - used in the methyl green-pyronin method for differential coloration of nucleic acids. P 2805 (OTTO) Pyronin B Cas 2150-48-3 - used in the methyl green-pyronin method for coloration of nucleic acids.