The Alcian Blue (pH 2.5) Stain Kit is intended for use in the histological visualization of sulfated and carboxylated acid mucopolysaccharides and sulfated and carboxylated sialomucins (glycoproteins).Acidic Sulfated Mucosubstances: BlueHyaluronic Acid: BlueSialomucins: BlueNuclei: RedBackground: PinkControl: Intestine or Colon.Kit contents: AAG125, Acetic Acid Solution (3%), 125 ml x 2.ANC250, Alcian Blue Solution, pH 2.5, 250 ml.PAQ250, Periodic Acid Solution (1%), 250 ml.SRF250, Schiff’s Solution, 250 ml.HMM125, Hematoxylin, Mayer’s (Lillie’s), 125 ml x 2.