Cleansing compositions containing stable silver
Disclosed is a cleansing composition having pH of at least 9, said composition comprising: (i) 20 to 85 wt % anionic surfactant; and, (ii) a silver(I) compound having silver ion solubility (in water at 25° C.) of at least 1×10 −4 mol/L, at a level equivalent to silver content of 0.01 to 100 ppm, wherein the free alkali content of said composition is less than 0.01%. The composition is a robust and improved cleansing composition with a stable colour.
1. A cleansing composition having pH of at least 9 , said composition comprising:
(i) 20 to 85 wt % anionic surfactant; and,
(ii) a silver(I) compound having silver ion solubility (in water at 25° C.) of at least 1×10 −4 mol/L, at a level equivalent to silver content of 0.01 to 100ppm, wherein the free alkali content of said composition is less than 0.01% and wherein said silver compound is selected from the group consisting of silver oxide, silver nitrate, silver acetate, silver sulfate, silver benzoate, silver salicylate, silver carbonate, silver citrate or silver phosphate.
2. A cleansing composition as claimed in claim 1 comprising 0.01 wt % to 10 wt % free fatty acid.
3. A cleansing composition as claimed in claim 1 comprising said silver(I) compound at a level equivalent to silver content of 1 to 50 ppm.
4. A cleansing composition as claimed in claim 1 wherein said silver compound is silver oxide, silver sulfate or silver citrate.
5. A cleansing composition as claimed in claim 1 wherein said anionic surfactant is soap of C8 to C22 fatty acids.
6. A composition as claimed in claim 1 further comprising a carrier selected from talc, glycerin or triethylamine for the silver(I) compound.