Synonyms: 4-(2-Hydroxyethyl)piperazine-1-ethanesulfonic acid; N-(2-Hydroxyethyl)piperazine-N′-(2-ethanesulfonic acid)
Formula: C8H18N2O4S
Formula Weight: 238.30
CAS No.: 7365-45-9
Purity: ≥99.5% (titration)
Other Notes: Easily compare specifications for HEPES products with the HEPES specification table.
Abs.: A1M/280, H2O ≤0.035
Anion Traces: chloride (Cl-): ≤0.05%
Assay: ≥99.5% (titration)
Cation Traces: Cd: ≤0.0005%
Ign. Residue (900°C): ≤0.1% (as SO4)
Impurities: Insoluble matter, passes filter test
Loss: ≤1.0% loss on drying, 110°C
pH: 5.0-6.5 (1 M in H2O)
pKa (25°C): 7.5
Product Line: BioXtra
Quality Level: ELITE
Solubility: H2O: soluble1 M, clear, colorless
Useful pH Range: 6.8 - 8.2