HEPES Potassium Salt CAS No: 82207-62-3

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HEPES has been described as one of the best all-purpose buffers available for biological research.1 Similar to many amino acids, HEPES is zwitterionic at most biological pHs.



CAS Registry Number 82207-62-3
Name HEPES Potassium Salt
Synonyms N-(2-Hydroxyethyl)piperazine-N′-(2-ethanesulfonic acid) potassium salt, 4-(2-Hydroxyethyl)piperazine-1-ethanesulfonic acid potassium salt
Molecular Formula C8H17KN2O4S
Molecular Weight 276.39
Molecular Structure



Test H1133, Ultra Pure
Appearance White Powder
Assay (by titration, on dried basis) ≤ 99.0%
Solubility (1M solution in H2O) Clear, complete, colorless
Identification (by IR) Conforms to structure
Loss on Drying (3 hours @ 105°C ≤ 1.5%
UV Absorption (1M @290nm) ≤ 0.20
Heavy Metals (Lead) ≤ 0.0005%
Specification Sheet
Specification Sheet HEPES Potassium Salt Spec


Material Safety Data Sheet