S P E C I F I CA T I O N S

TROPAEOLIN O

Synonyms:					C.I. 14270; Acid Orange 6;
Chrysoin; Resorcinol yellow

CAS No:					547-57-9

Formula:					C12H9N2NaO5S

F.W.:						316.27

Appearance:					Dark-orange to rust-colored powder

Lambda max:				490nm (in 0.1N Sodium Hydroxide)

Dye content:					~65%

Visual Transition Interval			From pH 11.0 (yellow)
To      pH 12.7 (red)

Solubility:					Clear, red brown solution
 (10mg/ml 1N NH4OH)

Effective: 12/16/08