Introduction
Periodic acid (H5IO6) is frequently used with special staining in histopathology, such as P.A.S. (Periodic Acid Schiff) method used for staining aldehydes, mucopolysaccharides and mucoproteins in purple/magenta. Should basement membranes, glycogen, bacteria and fungi are to be displayed, Periodic acid, 1% solution may be used with Grocott or P.A.S.M./Jones staining methods.