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Synonyms: 4-(2-Hydroxy-1-naphthylazo)benzenesulfonic acid sodium salt, Acid Orange A, Acid Orange 7, Orange II, Tropaeolin 000 No. 2
Acid orange II - is a pH indicator and applicable in biological applications.
A 1371 (OTTO) Acid orange II Cas no 633-96-5 - used in the Wilson-Ezrin method for pituitary acidophils, as a counterstain following Heidenhain’s or Weigert’s hematoxylin on paraffin sections.
Signal word Warning
Certificate Of Analysis
(For eg. B 1615-0108)
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