Micellar catalysed reaction with hydroxide ion and mono phosphoramide ester of 2-methoxy phenyl phosphoramide (2-MPPA) sodium buffered solution at pH 8.0-10.0 with borate ions. The first order rate constant for the reaction of hydroxide (OH^-) ion with 2-MPPA through maximum inhibited the concentration of Sodium Lauryl Sulphate (NALS). Micelles 0f NALS are least and anionic micelles of (NALS) have little effect on the reaction rates probably because anionic micelles strongly inhibit the nucleophilic effect.