Got mine from a dealer who sells chemical's for laboratories. I was anxious AF buying the SN from the dealer face to face. I came up with so many different stories in my mind about purchasing SN. It was a scary moment walking into his store. I thought he'll ask for a certificate or something of proof. Turns out, i walked in, he handed me the bottle and i paid and i walked out with no questions asked. Buying SN isn't that much of a risk, or maybe SN isn't considered a risk yet in my country(India). I feel purchasing SN in the US isn't that much of a risk but it's always safe to have a backup story. Just in case.