Gaba International Holding Ag

Alan C Ceresa

Elisabeth Scherrer

René Heckendorn

Disclosed herein are processes for oxidising Sndissolved in an aqueous solution to stannic compounds using NOand optionally Oas oxidants, wherein the aqueous solution is kept at a pH in the range of 0 to 7, wherein a salt Sn(X)and the oxidants are used according to the reaction scheme a Sn(X)+b O+c NO&#x2192;stannic compounds in which scheme a, b and c are mole numbers; with the proviso that when b is essentially zero, then the aqueous solution is essentially free of Cl, HSOand SO2.

Processes for the preparation of stannic oxide

An oral care composition comprising a) an aqueous phase; b) stannous ions solvated in the aqueous phase; c) nitrates solvated in the aqueous phase; wherein the total content of said nitrates is such that the molar amount of nitrogen in the aqueous phase, measurable as nitrate, is less than 2 times the molar amount of solvated stannous ions; and d) a flavor substance, which is preferably solvated, dispersed or emulgated in the aqueous phase. Disclosed are also containers containing the composition; and processes and uses for stabilizing stannous ions against oxidation, using nitrates.

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Allschwill, Switzerland

Alan C Ceresa