Bayan an sanya shi a cikin ruwa, yana da aikin saman kuma tare da caji mara kyau wanda ake kira surfactant anionic.
Anionic surfactants sune samfuran da ke da tarihin mafi tsayi, mafi girman ƙarfin aiki da mafi yawan iri a cikin surfactants. Anionic surfactants sun kasu kashi sulfonate da kuma alkyl sulfate bisa ga tsarin da hydrophilic kungiyoyin, wanda a halin yanzu babban rukuni na anionic surfactants. Daban-daban ayyuka na surfactant aka yafi samu magana a canza kaddarorin na ruwa surface, ruwa-ruwa dubawa da ruwa-m dubawa, wanda surface (iyaka) Properties na ruwa ne key batu.