Synonyms: 4-(2-Hydroxyethyl)piperazin-1-ylethanesulfonic acid , HEPES free acid Suitable for use in biopharmaceutical manufacturing applications. Formula: C8H18N2O4S MW: 238.31 g/mol Melting Pt: 210…215 °C Density: 1.448 g/cm³ (20 °C) Storage…