1. Mchere wa Quaternary ammonium ndi mankhwala omwe amapangidwa posintha maatomu onse anayi a haidrojeni mu ma ion ammonium ndi magulu a alkili.

Iwo ndi cationic surfactant ndi zabwino bactericidal katundu, ndi ogwira mbali ya bactericidal ntchito yawo ndi gulu cationic opangidwa ndi kuphatikiza organic mizu ndi maatomu asafe.
2. Kuyambira m’chaka cha 1935, pamene Ajeremani anatulukira mmene alkyl dimethyl ammonium gasification amapha tizilombo toyambitsa matenda, anaigwiritsa ntchito pochiritsa yunifolomu ya asilikali pofuna kupewa matenda. Kafukufuku wokhudza zida za antibacterial mchere wamchere wa quaternary ammonium wakhala akuyang'ana kwambiri ofufuza. Zida za antibacterial zokonzedwa ndi mchere wa quaternary ammonium zili ndi antibacterial properties ndipo zimatha kugwiritsidwa ntchito kwambiri m'madera ambiri monga mankhwala, madzi, ndi chakudya.
3. Ntchito za mchere wa quaternary ammonium ndi:

Ma fungicides aulimi, mankhwala ophera tizilombo, ophera tizilombo m'madzi, opha tizilombo ta m'madzi, ophera tizilombo toyambitsa matenda, ziweto ndi nkhuku, mankhwala ophera tizilombo tofiira, ophera ndere za blue-green algae, ndi minda ina yophera tizilombo. Makamaka mchere wa Gemini quaternary ammonium uli ndi zotsatira zowononga kwambiri komanso zotsika mtengo.

Tetrabutylammonium bromide (TBAB), yomwe imadziwikanso kuti tetrabutylammonium bromide.

Ndi mchere wamchere wokhala ndi mamolekyu C₁₆ H₃₆BrN.

Chopangidwa choyera ndi kristalo woyera kapena ufa, ndi deliquescence ndi fungo lapadera. Ndiwokhazikika kutentha ndi kutentha kwa mumlengalenga. Kusungunuka m'madzi, mowa, ndi acetone, kusungunuka pang'ono mu benzene.

Commonly ntchito ngati wapakatikati mu kaphatikizidwe organic, gawo kutengerapo chothandizira, ndi ion awiri reagent.