Description General description N,O-Bis(trimethylsilyl)hydroxylamine on reaction with 9-chloro-9-borafluorene yields 10-trimethylsilyloxy-9-aza-10-boraphenanthrene. It reacts with free phenolic steroids during the analysis of conjugated estrogen tablets and injectable formulations by GLC. Application N,O-Bis(trimethylsilyl)hydroxylamine has been used as reagent for the preparation of N-(dialkyl phosphinoyl)hydroxylamines and migration of simple alkyl groups in rearrangement of their O-p-nitrobenzenesulfonates. Packaging 1, 10 g in glass bottle