... powder- aslo called Propionic acid, ammonium salt;Propanoic acid, ammonium salt;Propanoic acid,ammonium salt;Propionic acid ammonium- .Properties: white ... point 45 . Soluble in water, ethanol and acetic acid. Has strong hygroscopicity, deliquescence in moist air. By ... antiseptic, antifungal agents. Formed under acidic conditions in the free acid, has antibacterial effect. The lower the pH, the ...