Abstract: A non-aqueous paste or gel dentifrice composition comprising a water soluble, non-aqueous vehicle having dispersed therein an orally acceptable inorganic peroxide and a bicarbonate salt. The quantities and relative proportions of the peroxide and bicarbonate are sufficient to provide quantities of bactericidally active oxygen upon breakdown of said peroxide when intermixing with water and introduction into the oral cavity. The bicarbonate also provides a neutral or basic pH upon dispersal and substantial dissolution of the composition in water. Preferably the composition comprises sodium bicarbonate and calcium peroxide in a preferable weight ratio (based on 60% CaO.sub.2 in the peroxide) of from about 4:1 to 6:1.

Abstract: A non-aqueous paste or gel dentifrice composition comprising a water soluble, non-aqueous vehicle having dispersed therein an orally acceptable organic or inorganic peroxide and a bicarbonate salt. The quantities and relative proportions of the peroxide and bicarbonate are sufficient to provide quantities of bactericidally active oxygen upon breakdown of said peroxide by tissue contact and/or by reaction with said bicarbonate in the oral cavity. The bicarbonate also provides a neutral or basic pH upon dissolution of the composition in water. The peroxide and/or bicarbonate is provided with a water soluble barrier coating which is insoluble in the vehicle, to prevent reaction therebetween in the absence of water dissolution of the coating. Normal dentifrice adjuvants may also be present, which can similarly be provided with a water soluble barrier coating.