Formulations and methods for preparing stable cosmetic compositions

A cosmetic or dermatologic composition raw material containing an arginine-component comprising

• i) a complex consisting essentially of an arginine compound and one carboxylic acid selected from anisic acid, levulinic acid, mandelic acid, sorbic acid, benzoic acid, ferulic acid, and syringic acid or two carboxylic acids selected from anisic acid, levulinic acid, mandelic acid, salicylic acid, sorbic acid, benzoic acid, ferulic acid, and syringic acid, wherein said complex does not comprise a humectant, and
• ii) a solvent;
• wherein the arginine compound is an arginine, a conjugate, or an analog thereof represented by Formula VI,
• wherein
• R1 represents
• a hydrogen atom, a hydroxyl group, an acyl or acyloxy radical, or an amino acid substituted or not on its free a-amino function, bound by a peptide bond;
• R2 represents
• a hydroxyl group, an amine, alkylamine or alcoxy radical, a silyloxy group, or an amino acid substituted or not on its free α-carboxylic function, bound by a peptide bond;
• n represents 3 or 4;
• wherein properties of the raw material include:
• solubilization of each of the one or two carboxylic acids by the complex;
• a humectant with water-attracting properties is unnecessary to stabilize the organic acids in solution, wherein the humectant is a glycerol, a glycol, an ester of polyglycerol, a glycolic ester, and/or an ester of sorbitan;
• pH of the raw material ranges from 4.0 to 7.0, inclusive;
• the raw material remains clear over multiple freeze thaw cycles;
• preservation of a finished cosmetic and dermatologic product by reduction of its decomposition due to chemical change or action of microbes, bacteria, fungi, yeast or a combination thereof without addition of a chemical preservative;
• and
• stabilization of the finished cosmetic and dermatologic product at pH 4.5-5.5. inclusive.