HEPES

IUPAC name2-[4-(2-hydroxyethyl)piperazin-1-yl]ethanesulfonic acid
Synonym4-(2-Hydroxyethyl)piperazine-1-ethanesulfonic acid, N-(2-Hydroxyethyl)piperazine-N?-(2-ethanesulfonic acid)
Molecular formulaC8H18N2O4S
Molar mass238.30 g/mol
AppearanceWhite crystalline powder
StorageRoom temperature
CAS number7365-45-9
Beilstein Registry Number883043
EC Number230-907-9
CID23831
PubChem Substance ID24895572
Useful pH Range6.8 – 8.2
pKa7.55 at 20°C7.48 at 25°C7.31 at 37°C

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