A Mouthwash of double Phase includes a Hydrophilic Phase, a Hydrophobic phase and a Hydrophilic Phase where the hydrotrope, contains an effective amount of a selected Conservative between GLUTARALDEHYDE, Sodium benzoate, Potassium sorbate, and combinations thereof, Well as methods for their use and Manufacture of these compositions.Claim 1: a Mouthwash Double Phase, characterized in that it comprises a Hydrophobic Hydrophilic Phase, a phase, a hydrotrope, and an effective amount of a selected Conservative between GLUTARALDEHYDE, Sodium benzoate, Potassium sorbate, and combinations thereof.Claim 2: Mouthwash of claim 1 wherein the hydrotrope Component comprising GLYCERIN and / or Propylene Glycol.Claim 3: Mouthwash of any of the preceding claims wherein The Hydrophobic Phase consists of an oil selected from mineral oil, Isopropyl Myristate, an Edible Oil, and combinations thereof.5: Mouthwash claim to any of the preceding claims wherein are Conservative, separately or in combination, in quantities by weight: mit 00005 - 0.15% sodium benzoate 0.1 - 0.5% Potassium sorbate； 0.05% - 0.5.Mouthwash claim 7: any of the preceding claims wherein the Hydrophilic Phase also contains Cetyl Pyridinium chloride - for example, in an amount of from 0.01 - 0.1%, for example, 0.05%. 8: Mouthwash Claim of any of the preceding claims wherein comprises Furthermore a PYROPHOSPHATE.9: Mouthwash claim to any of the preceding claims wherein an Anionic polymeric Synthetic Polycarboxylate also understand. 10: Mouthwash claim to any of the preceding claims wherein further includes a source of fluoride ion.11: Mouthwash claim to any of the preceding claims wherein is free of ethanol.Claim 14: a method to improve Oral Health, characterized in that it comprises the application of an effective amount of Mouthwash to any of the preceding claims to the oral cavity of a Subject that needs to: (a) reduce or inhibit the formation of cavities den , (b) reduce or inhibit our early lesions of Enamel(c) re
