This brown powder is very high in purity. it is 99.8% pure.In fact u 47700 powder is one of our main products. U 47700 opioid is highly selective for the µ-opioid receptor, and is research says it is roughly 7 to 8 times as powerful as morphine dose-per-dose. It is believed to be a strong kappa agonist, so should not produce substantial degrees of dysphoria or other unwanted effects. U-47700, like most opioids and their derivatives, is not suitable for human consumption. We are suppos to sell only to research chemists and laboratory personnel but we supply to all. At this point you might be asking what and opioid is. Opioid is a drug class. Opioids are substances acting on opioid receptors to produce morphine like effects. As a matter of fact vicodine, oxycontin, oxycodone and percocet fall under this class.