1. Usawoti we-ammonium we-quaternary yizinto ezakhiwe ngokufaka wonke ama-athomu e-hydrogen amane kuma-ion e-ammonium ngamaqembu e-alkyl.

Ziyi-surfactant ye-cationic enezakhiwo ezinhle kakhulu zokubulala amagciwane, futhi ingxenye ephumelelayo yomsebenzi wazo wokubulala amagciwane yiqembu le-cationic elakhiwe ngokuhlanganiswa kwezimpande eziphilayo nama-athomu e-nitrogen.
2. Kusukela ngo-1935, lapho amaJalimane ethola umphumela wokubulala amagciwane we-alkyl dimethyl ammonium gasification, ayisebenzisela ukwelapha iyunifomu yezempi ukuvimbela ukutheleleka kwamanxeba. Ucwaningo ngezinto zokulwa namagciwane ze-quaternary ammonium salt belulokhu lugxile kakhulu kubacwaningi. Izinto zokulwa namagciwane ezilungiselelwe ngosawoti we-quaternary ammonium zinezakhiwo ezinhle zokulwa namagciwane futhi zingasetshenziswa kabanzi emikhakheni eminingi efana nemithi, ukwelashwa ngamanzi, kanye nokudla.
3. Imisebenzi kasawoti we-quaternary ammonium ihlanganisa:

Izibulali-zinambuzane zezolimo, izibulali-magciwane ezindaweni zomphakathi, izibulali-magciwane zamanzi ezijikelezayo, izibulali-magciwane zasemanzini, izibulali-magciwane zezokwelapha, izibulali-magciwane zezilwane nezindlu zezinkukhu, izibulali-magciwane ze-red tide, izibulali-magciwane ze-algae eziluhlaza okwesibhakabhaka, kanye nezinye izinsimu zokubulala amagciwane kanye nokubulala amagciwane. Ikakhulukazi usawoti we-ammonium we-Gemini quaternary unemiphumela emihle kakhulu yokubulala amagciwane kanye nezindleko eziphansi.

I-Tetrabutylammonium bromide (TBAB), eyaziwa nangokuthi i-tetrabutylammonium bromide.

Kungusawoti wemvelo onefomula yama-molecule C ₁₆ H₃₆I-BrN.

Umkhiqizo omsulwa uyikristalu noma impuphu emhlophe, enokunambitheka okumnandi kanye nephunga elikhethekile. Uzinzile ekushiseni kwegumbi kanye nomfutho womoya. Uncibilika emanzini, utshwala, kanye ne-acetone, uncibilika kancane ku-benzene.

Cisetshenziswa kuphela njenge-intermediate ekwakhiweni kwezinto eziphilayo, i-phase transfer catalyst, kanye ne-ion pair reagent.