The 007-65HT is a bonded phase which possesses excellent thermal stability and hence can be used routinely for high temperature analyses. The 400-65HT is the identical to the 007-65HT but is offered on aluminum-clad tubing. Since the polyimide outer coating on standard columns begins to degrade at 380-400°C, the aluminum-clad tubing offers slightly longer column lifetime if the column is intended to be used at the elevated temperatures.
