Tom qab tau ionized hauv dej, nws muaj qhov ua haujlwm saum npoo thiab nrog qhov tsis zoo uas yog hu ua anionic surfactant.
Anionic surfactants yog cov khoom uas muaj keeb kwm ntev tshaj plaws, muaj peev xwm loj tshaj plaws thiab ntau yam ntawm surfactants. Anionic surfactants tau muab faib ua sulfonate thiab alkyl Sulfate raws li cov qauv ntawm lawv pawg hydrophilic, uas tam sim no yog cov pawg tseem ceeb ntawm anionic surfactants. Kev ua haujlwm ntau yam ntawm cov surfactant feem ntau pom muaj kev qhia nyob rau hauv kev hloov cov khoom ntawm cov kua nto, kua-kua interface thiab kua-khoom interface, uas cov nto (txheej txheem) cov khoom ntawm cov kua yog lub ntsiab lus tseem ceeb.