The Guangdong Fuk Yu Happy Dragon Chemical and Baby Toy Corporation, might possibly be skipping a few purification steps here.
GIven the way MDAI is synthesized I would be concerned about palladium and other heavy metal residues in something as ugly looking as that.
The synthesis has not involved distillation of the freebase, which gives pure white hydrochloride salt. or if it did then the chemists fuk up. MDAI has been around for a long long time and all the material from the late 90's was white.
There is also the issue of certificates of analysis from chinese sources, they are next to worthless, do not believe 99% or whatever because almost every time this has been independently looked at it has turned out to be a lie.