Auramine O | Spectrum Chemical®​​

Auramine O, also known as Basic yellow 2 or Pyocatanium aureum, is a diarylmethane dye used to stain acid-fast bacteria and as a fluorescent stain; it is soluble in water and ethanol. Ungraded products supplied by Spectrum are indicative of a grade suitable for general industrial use or research purposes and typically are not suitable for human consumption or therapeutic use.

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