Abstract
The hydrolysis of sodium octyl (SOS), myristyl (SMS) and cetyl sulfate (SCS) as sodium lauryl sulfate (SLS) homologue and that of sodium pentadecane-8-sulfate (SPS) as secondary alcohol sulfate in hydrochloric acid solution were studied. 1) It was recognized that the sodium alkyl sulfates were relatively stable below their critical micelle concentration (CMC) and less stable above their CMC as well as SLS. Accordingly, this phenomenon was ascribed to the micellization and the ionic atmosphere around the micelle of the sodium alkyl sulfate. 2) The sodium normal alkyl sulfate with the longer alkyl chain length was less stable than the shorter chain length. It was thought that the micelle with the longer alkyl chain length was more affected by gegen-ion than the shorter chain length.
