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Congo Red 25g


Congo Red

(Congo Red 4B, Cosmos Red, Cotton Red B, Cotton Red C, Direct Red 28, Direct Red R, Direct Red)

Certifiable Grade

  CAS Number:
  Chemical Formula:   C32H22N6O6S2Na2
  Molecular Weight:   696.67 g/mol


Congo Red is a pH indicator (Blue to Red; range 3.0 - 5.0). A cytoplasmic stain for tissues fixed in Bouin’s as well as a specific stain for amyloid.

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