Question: Cetalkonium chloride (CKC) is a quaternary ammonium compound of which type of cationic surfactant?
Sentence (from "Quaternary ammonium cation"): Unlike the ammonium ion (NH4+ ) and the primary, secondary, or tertiary ammonium cations, the quaternary ammonium cations are permanently charged, independent of the pH of their solution.
Relevant evidence: No