| 摘要 |
Low pH acidic compositions for chemical, pharmaceutical and cosmetic uses comprise two phases in solution. Phase I comprises about 2 to 98 weight % of several chemical, pharmaceutical and cosmetic substances. Phase II comprises about 2 to 98 weight % of an active aqueous acidic component having a pH val ue of less than about 1. This phase II aqueous acidic component is produced by: (a) admixing 5 to 20 weight % of a strong acid having a high degree of dissociation with from 5 to 20 weight % of another strong acid having a lowe r degree of dissociation for an effective period of time to produce a substantially homogeneous acidic mixture; and (b) admixing from about 1 to 5 weight % of weaker acids with low degrees of dissociation selected from hydroxycarboxylic acids or alpha hydroxy acids and about 1 to 5 weight % of a dicarboxylic acid with the aqueous acidic mixture in an effective amount of water to provide an aqueous acidic mixture. |
