HEPES (N-[2-Hydroxyethyl]piperazine-N\\\\\\\'-[2-ethanesulfonic acid]), Sodium Salt Also known as N-(2-Hydroxyethyl)piperazine-N\\\\\\\'-(2-ethanesulfonic acid), sodium salt or 4-(2-Hydroxyethyl)piperazine-1-ethanesulfonic a

HEPES (N-[2-Hydroxyethyl]piperazine-N'-[2-ethanesulfonic acid]), Free Acid Also known as N-[2-Hydroxyethyl]piperazine-N'-[2-ethanesulfonic acid]. A zwitterionic "Good Buffer" because it has a pKa value near physiological pH