| HEPES Sodium is a biological buffer (zwitterionic) designed by Good, et al., and typically referred to as Goods buffer useful in cell culture media formulations. Selection of biological buffer systems should include the following criteria: exclusion by biological membranes, low absorption between 240 and 700nm, chemically stable, and stable to temperature and concentration changes. Synonym: N-[2-Hydroxyethyl]piperazine-N-[2-ethanesulfonic acid] sodium salt CAS No: 75277-39-3 Molecular Formula: C8H17N2O4SNa Molecular Weight: 260.3 Purity: 99% (Dried basis) Appearance: White, crystalline powder pH (1%): 10.0 1.0 pKa: 7.45-7.65 Loss on Drying: 3% Heavy Metals: 0.0001% RNase, DNase, Protease: None Detected Endotoxin: 2EU/mg Storage and Stability: Store at RT Country of Origin: USA |
