If you get high from it and it's 40 a g then it's most likely a cannabinoid agnostic (it's most likely a mixture of synthetic cannabinoids and not just pure JWH-018 as I find pure JWH-018 different from the spice i've smoked as the spice was longer lasting and more of a head high and a sort of energetic body high than a heavy stoned producing body high that the powder brought) which do not show up on urine screenings as most do not produce the same metabolites as THC so if your getting urine tested it is a good substitute for the ganja. Though I heard that JWH-018 was said to cause malignant tumors in rats according to some post I read someone made from BL, whether it could cause the same in human I couldn't tell you. It also contains a Napthene ring which is known to be a highly carcinogenic molecule though I've also read from posts made by people on BL that it is debatable whether the Napthene ring is an active molecule in the JWH's or not, what molecules are inhaled after pyrosis occurs is unknown at this point. It has also been said that JWH-017 a relative of JWH-018 is confirmed to be cancerous. I've read most of this stuff from BL and other internet websites whether all this information is true I couldn't tell yea but most of it seems pretty believe able to assume it's not the safest chemical. Also I wouldn't recommend buying the pure JWH-018 powder, it get's you extremely high but only lasted about 30 minutes before I had to smoke another bowl. So I was pretty much smoking 20 bowls a day if I wanted to stay high all day (which I usually do... hehe) so the g I had lasted me and a friend I shared a fair amount with 2 weeks and by the end of the 2 weeks we had to had almost 3x the amount of powder then we had to originally which leads me to believe the powerful stimulating effects JWH-018 has on the CB1 and CB2 receptors builds up a tolerance to them, the tolerance also seemed the effect my tolerance to smoking cannabis as well even though I hadn't smoked it for 2 weeks (which would have normally lowered my tolerance) and instead smoke the JWH which was white with a mild off yellowish color advertised by the company to be 99.8% purity and has been known to be a good reliable fast retailer of JWH. ( I will not give out the name of said company, JWH is currently legal and is said not to fall under the federal analogue act of 1947 in the U.S. so most companies are easy to find)
smoke on and happy times 
