HF is life/death serious, even in small quantities when not extremely concentrated.  Pay very close attention, and always HAVE ALL APPROPRIATE FIRST AID SUPPLIES (fresh) at hand.

1 - 8 are required reading for approval of HF use, and are covered on the test.
The last one, #9, provides technical information for which few will have any need or use, but you must know of its existence and where it can be found..

Generic Training Record blank form [pdf] [docx]