You can get IGF tested you know?
There are a few companies that tested 95%+ purity while others tested under 80%.
A guy did alot of companies a while ago on another board, caused alot of heat between sponsors there and mods locked the thread because the companies that scored low were getting pissed their results were being posted up showing their crap products.
3 good companies scoring over 90% - Maximpep, ergopep, and extremepeptides were 3 I know. There are probably a few others that are up there as well, but those are 3 I remember and order from.