Science Forums 2

[Mercedes Benzene]

The United States, and many other countries for that matter, have a zero-tolerance policy for the possession of controlled substances, regardless of any potential educational use.
This is simply a public safety measure, and applies to many hobbies not including chemistry (amateur rocketry for instance). Using the example of rocketry, one must obtain special training and licensure before they can purchase engines of particular size and power.

The same sort of thing applies to the chemistry of "illegal" substances. A lab receives a license in order to purchase monitored/controlled amounts of said compounds.
It's funny that you mention mescaline, because my lab actually uses mescaline to produce analog chromophores. One must have a DEA license to purchase it.

In short, I'm sorry to say, but if you don't work at a legitimate scientific institution, it's not going to be possible to purchase chemicals such as mescaline.

This is a shame, because there are people such as yourself who want to carry out legitimate scientific work... and I suppose to some degree it limits scientific expansion, but it's the only way to keep things safe and fair for everyone.