Azorubin, also named Chromotrope FB or Acid Red 14, is used In microscopy for cytoplasmic and and nuclear staining in haematological and histological applications. The stain is a sulfated naphtyl diazo dye. ? max. (0.001 % in water)A 1 cm/? max. (0.001 % in water) 514 - 522min. 0.4 Azorubin, also named Chromotrope FB or Acid Red 14, is used In microscopy for cytoplasmic and and nuclear staining in haematological and histological applications. The stain is a sulfated naphtyl diazo dye. ? max. (0.001 % in water)A 1 cm/? max. (0.001 % in water) 514 - 522min. 0.4