4-(2-Hydroxyethyl)piperazine-1-ethanesulfonic acid hemisodium salt

• CAT Number: M010708
• CAS Number: 103404-87-1
• Molecular Formula: C8H17N2NaO4S
• Molecular Weight: 260.28
• Purity: ≥95%
• Storage: -20°C
• IUPAC Name: sodium;2-[4-(2-hydroxyethyl)piperazin-1-yl]ethanesulfonate
• InChI: InChI=1S/C8H18N2O4S.Na/c11-7-5-9-1-3-10(4-2-9)6-8-15(12,13)14;/h11H,1-8H2,(H,12,13,14);/q;+1/p-1
• InChIKey: RDZTWEVXRGYCFV-UHFFFAOYSA-M
• SMILES: C1CN(CCN1CCO)CCS(=O)(=O)[O-].[Na+]

4-(2-Hydroxyethyl)piperazine-1-ethanesulfonic acid hemisodium salt（Cat No.:M010708）, commonly abbreviated as HEPES hemisodium salt, is a zwitterionic organic buffer. It is widely used in biological and biochemical research to maintain the pH of solutions close to physiological pH, particularly in cell culture media and enzyme assays. This buffer is effective in a pH range of 6.8 to 8.2 and is favored for its minimal interference with biological processes. The addition of a sodium ion enhances its solubility and stability, making it more versatile for various experimental conditions in molecular biology, biochemistry, and pharmaceutical research.