Orange II, certified

A general tissue stain with Eosin and Azur-C. Substitute for Orange G if a stronger yellow is desired for contrast.

(Acid Orange 7; Acid Orange II, Y or A; Gold Orange; Mandarin G; Orange A, P or R; Orange Extra; Tropaoelin OOO No.2)
C₁₆H₁₁N₂O₄SNa   F.W. 350.33   CAS #633-96-5
Solubility: 3.0% Water; 0.15% Alcohol; 2.5% Cellosolve; 8.0% Glycol; 0.0% Xylene
Dye Content: approx. 75%

A general tissue stain with Eosin and Azur-C. French, Stain Tech., 1, 79 (1926). Counterstain for Heidenhain's Hematoxylin in animal histology. A substitute for Orange G if a stronger yellow is desired for contrast. J. Lab. Med., 28, 995 (1943)