表面活性劑者(食品工業之作乳化劑,若植脂末之屬),雙親性化合物也。
對十二烷基苯磺酸鈉之結構簡式:
夫表面活性劑,其一爲長烴基,若上式之左側;其一則極性親水基,若上式之磺基鈉。稀溶液,則分子著之水面。濃,則成膠束。
表面活性劑,其用甚廣,若食品乳化,若洗滌污漬。亦可作化學增溶劑,若苯難溶于水,然可溶於對十二烷基苯磺酸鈉之水溶液。
對十二烷基苯磺酸鈉,無磷洗滌劑也。是以極降表面活性張力於水,故其強於去油污也。適用於硬水(富鈣鎂離子),亦常作增溶劑於水。
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