Synonyms:
4-(2-Hydroxyethyl)piperazin-1-ylethanesulphonic acid
, 2-(4-(2-Hydroxyethyl)piperazin-1-yl)ethanesulfonic acid
, 2-(4-(2-Hydroxyethyl)piperazin-1-yl)ethanesulphonic acid
, 4-(2-Hydroxyethyl)piperazin-1-ylethanesulfonic acid
, HEPES free acid
M-Clarity™ quality level = MQ100
391338-5KG
391338-100GM
391338-500GM
391338-25GM
391338-25GM
391338-1KG
391338-5KG
391338-100GM
391338-500GM
391338-1KG
80058-228EA
134.08
USD
InStock
80058-228
CA80058-236
80058-236
CA80058-234
80058-234
CA80058-232
80058-232
CA80058-230
80058-230
CA80058-228
HEPES-2-[4-(2-Hydroxyethyl)-1-piperazinyl]-ethanesulfonic acid free acid ≥99% (by titrimetric analysis on dry substance), ULTROL®, Calbiochem®, Millipore®
HEPES (4-(2-Hydroxyethyl)piperazin-1-ylethanesulphonic acid)
A zwitterionic N-substituted aminosulfonic acid buffer. HEPES has its maximum buffering capacity very near the pH of mammalian tissue fluids (pKa of 7.31 at 37°C). Exhibits no metal binding and has a small temperature dependent ΔpKa of -0.014/°C.
- Maximum buffering capacity
- Useful in the pH 6.8 to 8.2 range
- pKa (25 °C) 7.5
Absorbance (1.0 M, H₂O, 260 nm):≤0.05
Absorbance (1.0 M, H₂O, 280 nm): ≤0.04
Caution: Storage condition: OK to freeze