> But a study published in 2001 in the Journal of the American Medical Association said that a single gram in crystallized form, “evenly dispersed and inhaled, would kill more than 1 million people.”

Given the potency, how does the manufacturer make sure that dosages are dispersed equally during manufacture?

That one is a serious problem with the heroin/fentanyl/carfentanyl opiate family - more than a few people have died because their dealer didn't mix the fent with the heroin properly.