Theoretically... However, samples from certain vendors were sent for testing recently and the results showed that there was zero naphyrone present - was a mixture containing MDPV cut with an unknown cathinone. Other samples contain some naphyrone but - again - cut with "other stuff". And still others are a complete mystery. I recently sampled "pure" naphyrone which was not labelled as NRG-1 and it was definitely a different animal to any of the NRG-1 products I've sampled - and I've tried quite a range. Some definitely contain some naphyrone as there were obvious similarities, but they are definitely cut to hell with some other nasty crap which makes it feel far more toxic than the straight naphyrone I had.