3-[N, N-Bis (hydroxyethyl) amino] -2-hydroxypropanesulphonic acid sodium salt, nke a makwaara dị ka BES sodium salt, bụ ngwakọta kemịkal a na-ejikarị na nyocha biochemical na ngwa ọgwụ.Ọ bụ ihe na-emepụta sulfonic acid nke nwere ụdị nnu sodium, na-eme ka ọ bụrụ mmiri na-agbaze ma kwụsie ike na ngwọta mmiri.
BES sodium nnu nwere usoro ihe omimi nke C10H22NNaO6S na ịdị arọ molekụla nke ihe dịka 323.34 g/mol.A na-ejikarị ya eme ihe dị ka onye na-ebufe ihe n'ihi ike ya idowe ebe pH kwụsiri ike na ngwọta.
A maara ogige a maka ikike magburu onwe ya iguzogide mgbanwe pH kpatara site na dilution ma ọ bụ mgbakwunye nke acid na bases.A na-ejikarị ya na mmeghachi omume nje na enzymatic, mgbasa ozi omenala cell, ịdị ọcha protein, na ngwa ndị ọzọ ebe njikwa pH dị oke mkpa.