Comment · Tue, February 10, 2015 · Ceretropic
Been playing with a melting point apparatus, so far I've been testing and calibrating a lot, but I've tested caffeine, aniracetam, and tianeptine.
Original post in this thread
meeeeoooowy · 13 points
When it comes to melting points and purity you want it to melt in a very small window right at the compounds melting point.
If it melts lower and has a wider window you have impurities.
If it melts higher, you are looking at an entirely different compound.
I haven't really been recording my results yet as I've been calibrating, practicing and triple checking everything. But the general results are the Caffeine was melting a little early (enough that I will be trying a different brand), the aniracetam was pretty much right on the money (New Star Nootropics and Health Supplement Wholesalers), but the tianeptine was without a doubt melting above it's supposed melting point.
Tianeptine's (CAS 66981-73-5) melting point is 129º - 131º. When I tested it looks like it started around 175º and finished closer to 200º.
While my tianeptine hasn't degraded into that hard sticky cement, I'm wondering if the heat that I was applying could have accelerated this change which could explain the differing melting point?
I think next time I'm going to take photos throughout the process to see if…
What they were answering
meeeeoooowy · 2 points
The label has CAS 66981-73-5, but I'm assuming that's a mistake.
u/MisterYouAreSoDumb · Ceretropic
Yep, that's my fault. I was rushed printing the little labels when things being finalized, and did not catch it till they were already all done. It's Tianeptine Sodium CAS: 30123-17-2. You need to do the melting point for the salt, not the freebase. It's 180°C