CTAB, and OTAC) surfactants at pH 7.45. The present reaction was characterized by the selectively efficient hydrolysis of the same substrate of S6− or S10 by the comicellar Cm (m=8, 10, or 12)–CTAB (or OTAC) or LauHis–CTAB (or OTAC) catalysts. Relevant factors to such a selective hydrolysis of a specific substrate by the comicellar catalysts were discussed by taking notice of the electrostatic-charge-attraction