Heptamethyldisilazane,99% Cas:920-68-3,134340-00-4 or 37074-17-2 EINECS:213-061-5 Group-protecting agent Specification:App:Colorless, transparent liquid ... Purity, 99.0%min,97.0%minDensity, 0.739g/cm3Refractive index,1 ... dot comHenan Kingway Chemicals Co., Ltd. Heptamethyldisilazane,Cas:920-68-3,134340-00-4 , 37074-17-2