Wheaton cryogenic vials, caps, vial racks, and freezer boxes are designed for simple identification and effortless handling. With Wheaton plastic Cryules®, both the closures and tubes are manufactured from medical-grade polypropylene with the same coefficient of expansion; this further enhances the leak proof qualities of these vials at changing temperatures.
All Wheaton Cryules and racks are autoclavable up to 121°C. When autoclaving plastic Cryules, the cap must be loosened or removed to allow pressure equalization upon cooling; this prevents pressure build-up within the vial.
The Wheaton glass Cryules are made from Wheaton 33 low extractable borosilicate glass, (that conforms to ASTM Type I, Class A and USP Type I requirements) which can be hermetically sealed.