I've never heard the term before, I've never heard of these strange letter-number drugs. What's it all about? I want in on the scene.
I know it sounds dumb, but I'm really not. I guess I should stop being lazy and look it up myself, but I just figured I'd go directly to people who know what they're talkin about and avoid the misinformation.
chems that haven't been scheduled and are still available via internet sites and emails. mostly include psychedelic phenethylamines (2c-x's), psychedelic tryptamines, and a whole variety of stimulants.
RC is research chemical, which are still chemicals, waiting to be researched or another way put, the scientist/doctors did not made any tests on it, so many effects are unknown, and carry many risk with RC usage. Some RCs are quite tested, some are very unknown.
Basically every chemical that didn't just naturally occur, generally used to describe those chemicals of the psychoactive type. MDMA and LSD would be in this category along with all the other random combinations of letters and numbers you'll see all over the web. There's also this, but it's not too much help. http://www.urbandictionary.com/define.php?term=rc