2C-B isnt exactly a street drug. Its usually bought off the internet either directly from labs, or from middle-men who have connections to a lab. Either that or a chemist, but its usually the former, rather than the latter.
If you yourself (or your bud for that matter) arent dealing with shady people, all should be fine.
2C-B is a wonderful drugs, I hope you enjoy it! Definitely one of my favorite psychedelics.