Hydrogen Pop Test -Dangers:

Although most people have not had a problem with the hydrogen “pop” test, some schools have, with several cases of test tubes exploding and injuring students.
It seems to be either inferior glassware, or students doing the pop test too close to the Hydrogen gas source, or a combination of both.
It is recommended that Pyrex brand test tubes be provided for this experiment.
They are available from Crown Scientific.

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