1% Acetic Acid is a component for the following MasterTech Stain Kits: Masson's Trichrome Stain Kit, Masson's Trichrome 2000 Stain Kit, and Russell-Movat Pentachrome Stain Kit. Running out of a component in your MasterTech Stain Kit? Replace your used or expiring item by purchasing an individual solution. Components are available in larger sizes to fit your rate of usage.