1. Iityuwa ze-ammonium ze-quaternary ziikhompawundi ezenziwe ngokutshintsha zonke ii-athomu ze-hydrogen ezine kwii-ion ze-ammonium ngamaqela e-alkyl.

Ziyi-cationic surfactant eneempawu ezintle zokubulala iintsholongwane, kwaye inxalenye esebenzayo yomsebenzi wazo wokubulala iintsholongwane liqela le-cationic elenziwe ngokudityaniswa kweengcambu zezinto eziphilayo kunye neeathom ze-nitrogen.
2. Ukususela ngo-1935, xa amaJamani afumanisa ukuba i-alkyl dimethyl ammonium gasification ibangela ukubulala amagciwane, ayisebenzisela ukunyanga iiyunifomu zomkhosi ukuthintela ukosuleleka ngamanxeba. Uphando ngezinto zokulwa namagciwane zetyuwa ye-quaternary ammonium belusoloko lugxininiswa kakhulu ngabaphandi. Izinto zokulwa namagciwane ezilungiselelwe ngeetyuwa ze-quaternary ammonium zineempawu ezilungileyo zokulwa namagciwane kwaye zingasetyenziswa kakhulu kwiindawo ezininzi ezifana namayeza, unyango lwamanzi, kunye nokutya.
3. Imisebenzi yeetyuwa ze-quaternary ammonium ibandakanya:

Iifungicide zezolimo, izibulali-ntsholongwane kwiindawo zikawonke-wonke, izibulali-ntsholongwane zamanzi ezijikelezayo, izibulali-ntsholongwane ze-aquaculture, izibulali-ntsholongwane zonyango, izibulali-ntsholongwane zemfuyo kunye nezindlu zeenkukhu, izibulali-ntsholongwane ze-red tide, izibulali-ntsholongwane ze-algae eziluhlaza okwesibhakabhaka, kunye nezinye iindawo zokubulala iintsholongwane kunye nokubulala iintsholongwane. Ingakumbi iityuwa ze-ammonium ze-Gemini quaternary zinemiphumo emihle yokubulala iintsholongwane kunye neendleko eziphantsi xa zizonke.

I-Tetrabutylammonium bromide (TBAB), ekwaziwa ngokuba yi-tetrabutylammonium bromide.

Yityuwa yendalo enefomula yemolekyuli C ₁₆ H₃₆BrN.

Imveliso ecocekileyo yikristale emhlophe okanye umgubo, enevumba elimnandi nevumba elikhethekileyo. Ihlala iqinile kubushushu begumbi kunye noxinzelelo lomoya. Inyibilika emanzini, kwi-alcohol, nakwi-acetone, inyibilika kancinci kwi-benzene.

CIsetyenziswa kuphela njengesixhobo esiphakathi kwi-organic synthesis, i-phase transfer catalyst, kunye ne-ion pair reagent.