You have no idea where the source their chemicals or who produces the tirz or what conditions it’s packaged in lol. You have no idea what it could be cross contaminated with.Based on the fact that they are in trouble and the US government basically calls them smugglers, but you are free to order from them - Im not stopping anyone, just expressing my opinion here.
If you mean cross-contamination, you don't need in-depth knowledge, just google how peptides are lyophilized if you're interested.
I’m sure a company known to doctor their lab results is totally trustworthy though.