1. Cusbada ammonium ee Quaternary waa iskudhisyo la sameeyay iyadoo lagu beddelayo dhammaan afarta atamka haydarojiin ee ku jira amooniyamka kooxo alkyl ah.

Waa cationic surfactant leh sifooyin bakteeriya oo aad u fiican, qaybta wax ku oolka ah ee waxqabadkooda bakteeriyaduna waa kooxda cationic ee ay sameeyeen isku-darka xididdada dabiiciga ah iyo atamka nitrogen.
2. Tan iyo 1935, markii Jarmalku ogaadeen saameynta bakteeriyada disha ee gaaska alkyl dimethyl ammonium, waxay u isticmaali jireen daawaynta dharka militariga si looga hortago caabuqa nabarrada. Cilmi-baarista ku saabsan milixda ammonium ee quaternary waxay had iyo jeer ahayd diiradda ay saarayaan cilmi-baarayaasha. Alaabada ka hortagga bakteeriyada ee lagu diyaariyey cusbada ammonium ee quaternary waxay leeyihiin sifooyin wanaagsan oo bakteeriyada dila waxaana si weyn loogu isticmaali karaa dhinacyo badan sida daawada, daaweynta biyaha, iyo cuntada.
3. Hawlaha cusbada ammonium-ka ee quaternary waxaa ka mid ah:

Daawooyinka lagu dilo jeermiska beeraha, jeermiska dila meelaha dadweynaha, jeermiska dila biyaha wareegaya, jeermiska dila biyaha, jeermiska dila daawada, jeermiska dila xoolaha iyo digaagga, jeermiska dila ee cas cas, jeermiska dila algae-cagaaran, iyo meelaha kale ee lagu nadiifiyo iyo lagu dilo jeermiska. Gaar ahaan cusbada ammonium ee Gemini quaternary waxay leeyihiin saameyn bakteeriya oo heer sare ah iyo kharash guud oo hooseeya.

Tetrabutylammonium bromide (TBAB), oo sidoo kale loo yaqaan tetrabutylammonium bromide.

Waa milix dabiici ah oo leh qaacidada molecular-ka C ₁₆ H₃₆BrN.

Badeecada saafiga ah waa kiristaal cad ama budo, oo leh dhadhan macaan iyo ur gaar ah. Waa mid deggan heerkulka qolka iyo cadaadiska jawiga. Waxaa lagu milmaa biyaha, khamriga, iyo acetone, waxaana lagu milmaa benzene.

CWaxaa loo isticmaalaa oo keliya sidii dhexdhexaadiye isku-darka dabiiciga ah, kicinta wareejinta wejiga, iyo falgalka lamaanaha ion.