Thanks for your response HumbleVoyager. Very useful. I'm pretty confident regarding the integrity of the substance, but I'm going to consider the option you suggest, of getting it verified.
I have found a youtube video which gives a simple answer and instruction for conversion to salt. I think I will first try vapor, as you have talked about. I've basically come to the same conclusion you suggested: that there's some minor oxidation, which likely wouldn't be much of a problem. IMO there's a greater likelihood of accidentally taking too large a dose by using the salt which is mostly (but not completely!) avoided by vaping (carefully).
I have found a youtube video which gives a simple answer and instruction for conversion to salt. I think I will first try vapor, as you have talked about. I've basically come to the same conclusion you suggested: that there's some minor oxidation, which likely wouldn't be much of a problem. IMO there's a greater likelihood of accidentally taking too large a dose by using the salt which is mostly (but not completely!) avoided by vaping (carefully).