QF has a shelf life of 18-24 months. It can be reheated 100's of times. The only caution(s) I know of is never over heat it to the boiling point and do not expose it to periods of direct sunlight. N2
IamN2pot Reviewed by IamN2pot on . Nervous as hell! Many thanks to you N2 for all the useful info you've provided. I have a few questions if you have a moment. Is a one 2oz bottle enough to fill 60ml or should use two? After freezing my subbed urine, if I thaw it out, can I freeze it again provided 8hrs hasnt elasped? What I'm most nervous about is whether or not I'll be observed for my pre-employment UA. Unfortunately, this company conducts random tests with great frequency so I'll have to put down my pipe after I'm hired :( Well at least Rating: 5