A word of caution, if you buy powdered pentobarbital in China
always test it because most of the tie it's mixed with other substances.
I bought mine back in 2013 from the well known J and had it tested some weeks ago, below are the results.
View attachment 15743
As you can see it's only 69% purity which means the 15g I bought then are in reality on 10g of pure pentobarbital.
As far as I know in 2013 he was still considered trustworthy but he lied when he told me the purity was more than 90 %