LSD (LSD-25, from German -- Lysergsäurediethylamid) -- diethylamide of d-lysergic acid.
Being psychoactive substance, LSD does not cause physical dependence, and does not affect human's physical health, but with specific circumstances can cause or sharpen already existing mental disorders. LSD got number 25, because it was 25th connection synthesized by lysergic acid. The discoverer of LSD is a Swiss chemist Albert Hofmann. Chemical formula is C20H25N3O. Molecular mass -- 323.431 . Full name of LSD is Lysergic Acid Diethylamide. CAS -- 50-37-3. LSD is inserted orally, intravenously and subcutaneously. It looks like a 25 mcg tablet. Trade names: Lysergide, Delysid.