1. Quaternary ammonium salts sune mahadi da aka samar ta hanyar maye gurbin dukkanin kwayoyin hydrogen guda hudu a cikin ions ammonium tare da kungiyoyin alkyl.

Su ne cationic surfactant tare da kyawawan kaddarorin ƙwayoyin cuta, kuma tasiri mai tasiri na ayyukan ƙwayoyin cuta shine ƙungiyar cationic da aka kafa ta hanyar haɗin tushen kwayoyin halitta da ƙwayoyin nitrogen.
2. Tun shekarar 1935, lokacin da Jamusawa suka gano illar bactericidal na alkyl dimethyl ammonium gasification, sun yi amfani da shi wajen maganin kakin soja don hana kamuwa da rauni. Binciken da aka yi akan kayan aikin kashe gishirin ammonium na quaternary ya kasance abin mayar da hankali ga masu bincike koyaushe. Kayayyakin ƙwayoyin cuta waɗanda aka shirya tare da gishirin ammonium quaternary suna da kyawawan abubuwan kashe ƙwayoyin cuta kuma ana iya amfani da su sosai a fagage da yawa kamar magani, maganin ruwa, da abinci.
3. Ayyukan gishiri ammonium na quaternary sun haɗa da:

Magungunan fungicides na noma, magungunan kashe gobara, masu zazzage ruwa, masu kashe ruwa, masu hana ruwa ruwa, magungunan likitanci, masu kashe dabbobi da gidajen kaji, masu kashe jajayen ƙwayoyin cuta, magungunan algae mai shuɗi-kore, da sauran wuraren haifuwa da hana cutar. Musamman Gemini quaternary ammonium salts suna da tasirin ƙwayoyin cuta da ƙarancin farashi.

Tetrabutylammonium bromide (TBAB), wanda kuma aka sani da tetrabutylammonium bromide.

Gishiri ne na halitta tare da tsarin kwayoyin C ₁₆ H₃₆BrN.

Samfurin tsantsar farin lu'ulu'u ne ko foda, tare da ƙamshi da ƙamshi na musamman. Yana da tsayayye a yanayin zafi da kuma yanayin yanayi. Mai narkewa a cikin ruwa, barasa, da acetone, mai narkewa kaɗan a cikin benzene.

Commonly ana amfani dashi azaman tsaka-tsaki a cikin haɗaɗɗun kwayoyin halitta, mai haɓaka canjin lokaci, da ion biyu reagent.