I have used xinhai's meth periodically since the SR1 days. I just ordered 1g of methamphetamine from xinhai and started out with 15mg. No effects were felt. Went up to 30mg and nothing. I then tried smoking 40mg and had little to no effect. My tolerance cannot be the issue as I haven't used methamphetamine in a year and a half and I have not used plain amphetamine in over a month. Eventually I got some effect with hundreds of milligrams but it was mild and any feeling faded quickly. A stimulant naive friend also tried some. He did not use any stimulants for over 2 years and had never tried methamphetamine. 30mg did nothing for him either and smoking another 20mg did fuck all. The entire gram is shit and I feel like I got ripped off. Messaged xinhai but haven't gotten a response. Thoughts?
Edit: xinhai offered to make it right and reship
Isopropylbenzylamine has nearly identical physical properties of methamphetamine. The melting point of the two chemicals has a margin of about 5degrees. Crystals are nearly identical, atomic weight is identical. Also isobenzylamine will test positive for meth via ELISA field tests. It's pretty much impossible to tell the difference in a side by side comparison without using. If you dissolve both in DMSO and recrystalize they will both 'co-crystalize', meth crystals will grow from nucleation points as will isobenzylamine and in same solution multiple nucleation points will result in crystals ('co-crystals') that look identical to either pure meth or pure isobenzylamine. It's the ideal cutting agent or bunk-culprit.
Isopropylbenzylamine will cause methmoglobinemia if regular consumption over time.