1. Quaternary ammonium salts o fa'aputuga fa'atupu e ala i le suia uma o fa'atama hydrogen i ion ammonium i vaega alkyl.

O i latou o se cationic surfactant ma mea sili ona lelei bactericidal, ma o le vaega aoga o latou gaoioiga bactericidal o le vaega cationic faia e ala i le tuufaatasiga o aʻa organic ma atoms nitrogen.
2. Talu mai le 1935, ina ua maua e Siamani le aʻafiaga faʻamaʻi o le alkyl dimethyl ammonium gasification, na latou faʻaaogaina e togafitia ai toniga a le militeri e puipuia ai manuʻa. O su'esu'ega i quaternary ammonium salt antibacterial material sa avea pea ma taulaiga o tagata su'esu'e. mea antibacterial saunia ma quaternary ammonium salts e lelei mea antibacterial ma e mafai ona faʻaaoga lautele i le tele o vaega e pei o vailaau, vai togafitiga, ma meaai.
3. O galuega tauave a masima ammonium quaternary e aofia ai:

Fa'ato'aga fungicides, fa'amalama nofoaga faitele, fa'ama'i vai ta'amilo, fa'ama'i fa'ama'i, fa'ama'i fa'ama'i, fa'ama'i manu ma fale moa, fa'ama'i mūmū, vaila'au limu lanumoana-lanumeamata, ma isi fanua fa'ama'i ma fa'amama. Aemaise lava Gemini quaternary ammonium salts ei ai a'afiaga fa'ama'i mata'utia ma tau maualalo maualalo.

Tetrabutylammonium bromide(TBAB), e lauiloa foi o le tetrabutylammonium bromide.

Ose masima fa'aola ma le fua mole mole C ₁₆ H₃₆BrN.

O le oloa mama o se tioata paʻepaʻe poʻo se paʻu, faʻatasi ai ma le deliquescence ma se manogi faʻapitoa. E mautu i le vevela o le potu ma le mamafa o le ea. Solu i le vai, ava malosi, ma le acetone, solute teisi i le benzene.

Cfa'aaogaina masani e fai ma mea fa'avauvau i le fa'asologa fa'aola, fa'aliliuga vaega fa'afefete, ma fa'aigoa pa'u ion.