1. Mchere wa quaternary ammonium ndi mankhwala opangidwa mwa kusintha maatomu onse anayi a haidrojeni mu ma ayoni a ammonium ndi magulu a alkyl.

Ndi mankhwala ophera tizilombo toyambitsa matenda otchedwa cationic surfactant omwe ali ndi mphamvu zabwino kwambiri zophera tizilombo toyambitsa matenda, ndipo gawo lothandiza la ntchito yawo yophera tizilombo toyambitsa matenda ndi gulu la cationic lomwe limapangidwa ndi kuphatikiza kwa mizu yachilengedwe ndi maatomu a nayitrogeni.
2. Kuyambira mu 1935, pamene Ajeremani adapeza mphamvu ya alkyl dimethyl ammonium gasification yopha mabakiteriya, adaigwiritsa ntchito pochiza mayunifolomu ankhondo kuti apewe matenda a mabala. Kafukufuku wokhudza zinthu zotsutsana ndi mabakiteriya za mchere wa quaternary ammonium wakhala akufunidwa kwambiri ndi ofufuza. Zinthu zotsutsana ndi mabakiteriya zokonzedwa ndi mchere wa quaternary ammonium zili ndi mphamvu zabwino zotsutsana ndi mabakiteriya ndipo zitha kugwiritsidwa ntchito kwambiri m'magawo ambiri monga mankhwala, madzi, ndi chakudya.
3. Ntchito za mchere wa quaternary ammonium ndi izi:

Mankhwala ophera tizilombo toyambitsa matenda a zaulimi, mankhwala ophera tizilombo m'malo opezeka anthu ambiri, mankhwala ophera tizilombo toyambitsa matenda m'madzi, mankhwala ophera tizilombo toyambitsa matenda m'madzi, mankhwala ophera tizilombo toyambitsa matenda m'zipatala, mankhwala ophera tizilombo toyambitsa matenda m'nyumba za ziweto ndi nkhuku, mankhwala ophera tizilombo toyambitsa matenda a red tide, mankhwala ophera tizilombo a algae obiriwira, ndi malo ena ophera tizilombo toyambitsa matenda. Makamaka mchere wa Gemini quaternary ammonium uli ndi mphamvu zopha tizilombo toyambitsa matenda komanso mtengo wotsika.

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

Ndi mchere wachilengedwe wokhala ndi formula ya molekyulu C ₁₆ H₃₆BrN.

Chogulitsacho ndi kristalo woyera kapena ufa, wokhala ndi kukoma kokoma komanso fungo lapadera. Chimakhala chokhazikika kutentha kwa chipinda ndi mpweya. Chimasungunuka m'madzi, mowa, ndi acetone, chimasungunuka pang'ono mu benzene.

Camagwiritsidwa ntchito kokha ngati chothandizira pakupanga kwa organic, phase transfer catalyst, ndi ion pair reagent.