兩(liang)性(xing)(xing)(xing)表面(mian)(mian)活(huo)(huo)(huo)性(xing)(xing)(xing)劑(ji)(ji)是(shi)兩(liang)性(xing)(xing)(xing)離子(zi)(zi)，這(zhe)意味著它們(men)的(de)(de)極性(xing)(xing)(xing)頭基團同時(shi)帶有(you)正電荷和負電荷，因此使(shi)總凈電荷為(wei)零。一般而言，兩(liang)性(xing)(xing)(xing)表面(mian)(mian)活(huo)(huo)(huo)性(xing)(xing)(xing)劑(ji)(ji)具(ju)(ju)有(you)低(di)毒(du)性(xing)(xing)(xing)，低(di)眼睛和皮膚刺激性(xing)(xing)(xing)，對硬水(shui)的(de)(de)耐(nai)受(shou)性(xing)(xing)(xing)，并具(ju)(ju)有(you)優異的(de)(de)起泡性(xing)(xing)(xing)和與(yu)其他表面(mian)(mian)活(huo)(huo)(huo)性(xing)(xing)(xing)劑(ji)(ji)的(de)(de)相容性(xing)(xing)(xing)。由于(yu)兩(liang)性(xing)(xing)(xing)表面(mian)(mian)活(huo)(huo)(huo)性(xing)(xing)(xing)劑(ji)(ji)的(de)(de)這(zhe)種獨特特性(xing)(xing)(xing)，它們(men)的(de)(de)性(xing)(xing)(xing)能取決(jue)于(yu)最終配(pei)方(fang)的(de)(de)pH值(zhi)-在酸性(xing)(xing)(xing)環(huan)境中，兩(liang)性(xing)(xing)(xing)離子(zi)(zi)具(ju)(ju)有(you)更(geng)多的(de)(de)陽離子(zi)(zi)特性(xing)(xing)(xing)，而在堿(jian)性(xing)(xing)(xing)環(huan)境中，它們(men)的(de)(de)行為(wei)更(geng)像陰(yin)離子(zi)(zi)表面(mian)(mian)活(huo)(huo)(huo)性(xing)(xing)(xing)劑(ji)(ji)。因為(wei)兩(liang)性(xing)(xing)(xing)表面(mian)(mian)活(huo)(huo)(huo)性(xing)(xing)(xing)劑(ji)(ji)的(de)(de)結(jie)構是(shi)兩(liang)性(xing)(xing)(xing)的(de)(de)，所(suo)以這(zhe)類分子(zi)(zi)與(yu)所(suo)有(you)其他類型的(de)(de)表面(mian)(mian)活(huo)(huo)(huo)性(xing)(xing)(xing)劑(ji)(ji)都是(shi)相容的(de)(de)。