Alkyl amido betaines, amphoteric surfactants

Amphoteric surfactants. More common are A -alkyl-betaines or iV-alkyl-amido-betaines. 

Alkanolamides Alkyl sulfonates Amine oxides Amphoteric surfactants Anionic surfactants Cocoamidopropyl betaine Betaine derivatives Amido guanidines Disulfonates... 

These are surfactants containing both cationic and anionic groups [10]. The most common amphoterics are the N-alkyl betaines, which are derivatives of trimethyl glycine (CH3)3NCH2COOH (described as betaine). An example of betaine surfactant is lauryl amido propyl dimethyl betaine Ci2H2sCON(CH3)2CH2COOH. These alkyl betaines are sometimes described as alkyl dimethyl glycinates. 

---