PIPES


 * This page is about the biochemical buffer PIPES. For information about other pipes, see Pipe.

PIPES is the common name for piperazine-N,N′-bis(2-ethanesulfonic acid), a frequently used buffering agent in biochemistry.

It is one of Good's buffers, with a pKa of 6.8. It has a negligible capacity to bind divalent metal ions.