| 摘要 |
1424714 Solution dilution indicator COLGATE-PALMOLIVE CO 13 Feb 1973 7075/73 Heading C6D [Also in Division D1] A concentrated liquid detergent composition (defined) comprises a surfactant, an aqueous solvent and a pH-sensitive dye, the pH of the composition being such that dilution of the composition with an aqueous diluent sufficient to give a concentration of the active ingredient appropriate to the intended use is indicated by a change in colour of the dye. Suitable pH- sensitive dyes are phenolphthalein and derivatives thereof. The surfactant may be a sodium alkyl ether sulphate and/or sodium N-coco-N- methyl taurate or an ethoxylated fatty alcohol. |
