NPS Always Very Yellow During Extraction

[beansteroo]

Greetings Nexians,

Hope anyone coming across this thread is have a pleasant day. SWIM is encountering something they can't quite understand during extractions...

SWIM has done extractions probably 15-20 times, almost always using Cyb's Hybrid ATB Salt Tek. Maybe beginner's luck, but the first couple times were very clean extractions, clear NPS pulled from the soup and into the evap dish, resulting in white and sometimes slightly yellow crystals after freeze precipitation and drying.

However, latest attempts SWIM is noticing that after coming into contact with the basified soup, the NPS becomes a very distinct yellow color. It's still transparent, just yellow. When pulling it out and put into a clean dish, the color is most easily described as 'radioactive yellow' lol... SWIM proceeded anyways with evaporation and freeze precipitation and it still resulted in crystalized spice, which is about the same yellow as the font theme of these forums. Totally understand that spice can have a yellow color to it, but this is my first time encountering the pulled NPS having such a striking color to it (attached photo for reference)

SWIM felt safe enough to test the spice after triple checking their process, notes, wiki, etc and verifying that no steps were missed, and has had positive experiences with it. Has anybody else experienced something like this?

 

[Animistic]

Often the solvent goes yellow when it is more saturated in goodies. If you're really concerned you could back salt (do and a/b on the solvent) but I'd say of you get crystals it's clean. Thats been my experience. The yellow colour in itself isn't cause for concern.

Maybe one of our resident chemists will confirm what exactly is going on here.

 

[Ernestine]

There are at least two theories. One is that polymorphism of DMT explains the yellow colour. See gaujac et al.

The other is that there is dye like chemical, unsurprisingly given the use of mhrb, that passes into the NPS and even in small amounts colours both the NPS and the extract yellow. I suppose it must also be soluble in polar solvents as it persists through backsalting/reextraction, or could it bind to the dmt molecules?