Orange II sodium salt (Certified by the Biological Stain Commission), Dye content =85%

Synonym: 4-(2-Hydroxy-1-naphthylazo)benzenesulfonic acid sodium salt, Acid Orange 7, Acid Orange A, Orange II, Tropaeolin 000 No. 2

CAS Number: 633-96-5

Empirical Formula (Hill Notation): C₁₆H₁₁N₂NaO₄S

Molecular Weight: 350.32

Beilstein Registry Number: 3898201

Color Index Number : 15510

EC Number: 211-199-0

MDL Number: MFCD00011657

PubChem Substance ID: 24851680

Packaging:
25, 100 g in poly bottle

Suitability:
Certified for use in the Wilson-Ezrin method for pituitary acidophils, as a counterstain following Heidenhain′s or Weigert′s hematoxylin on paraffin sections, and as a substitute for orange G in Floemming′s triple stain.