This 4 x 1-gallon container of ammonium hydroxide 29% by KMG Electronic Chemicals® is of megabit grade. It appears as a colorless liquid with an ammoniacal odor. Manufactured to parts-per-billion trace impurities. Due to Federal regulations, this item is not returnable. Material: Ammonium Hydroxide 29%. Grade: Megabit. Appearance: Colorless Liquid. Odor: Ammoniacal. pH: Greater Than 14. Boiling Point: 84.2°F (29°C). Vapor Pressure: 0.75bar (21°C). Vapor Density: Greater Than 1 (Air = 1). Specific Gravity: 0.895 (Water = 1). Solubility: Completely Soluble In Water. Cases only. KMG Electronic Chemicals® #: 405-063925.