The Alcian Blue (pH 2.5) Stain Pack is intended for use in the histological visualization of sulfated and carboxylated acid mucopolysaccharides and sulfated and carboxylated sialomucins (glycoproteins). Acidic Sulfated Mucosubstances:Blue Hyaluronic Acid:Blue Sialomucins:Blue Nuclei:Red Background:Pink Pack Includes: Alcian Blue Solution (pH 2.5), 1000ml Nuclear Fast Red Solution, 1000ml Acetic Acid Solution (3%), 2 x 1000ml