Q.  What temperature do I need to seal an ampule?
A. Our ampules are manufactured from 33 expansion borosilicate glass and require temperatures of 820°C in order to seal them.

Q. Does WHEATON sell a machine to flame-seal ampules?
A. No. However, there are companies that do sell sealing machines. Probably the most popular is called the Ampulmatic manufactured by Bioscience Inc.

Q. Can I store sealed ampules directly in the liquid phase of liquid nitrogen?
A. We do not recommend storage directly in contact with the liquid phase, only the gas phase.