| 摘要 |
PURPOSE:To provide a low-cost, high-safety title composition free from physiologically active compound, by adding a buffer solution containing malic acid, to a carpronium chloride composition. CONSTITUTION:The pH of a carpronium composition (e.g. hair lotion, hair cream, etc.) is adjusted between about 4 and 6 by adding a buffer solution containing malic acid (e.g. sodium malate-malic acid buffer solution). The residual amount of the carpronium chloride in the above prepared composition is more than about 90% after 3-year storage at room temperature. |
