Me? Oh that 90% was a number I pulled out of the air. If the labwork provided by the source was to be believed (and I do), the purple DPT was definitley purer than 90% I just dont remember what it was. This DPT was from 2003, and was not from a Chinese lab, not that the Chicoms guys can't have good, pure compounds....they can, I just mean this DPT came from a not so public, password protected 'vendor' back in the day, a rather historical one...who was known for being the real deal, never mixed up compounds, did manage to consistently provide rare, very pure rarieites (independently confirmed to be authentic and pure..in some cases by the good doc himself...along with things that I suspect came from biosynth like AMT, DPT hcl, DiPT, and other things that were not cost effective for him to make himself. He also was not targeted by 'webtryp'.
This was the guy who first brought 4-AcO-DIPT, methylone, and 2C-I to the early, fledgling "RC" market. And yea, I am comparing my memory of that purple DPT with my DMT extracting experience (I got really clever with things and am intimately familiar with all shapes and shades of DMT crystal, freebase, fumarate, etc and for sure got greater than 95% purity when I tried that hard (not worth it, the red was just fine). You are right...DMT is not DPT.