HEPES (2-[4-(2-hydroxyethyl)-1-piperazinyl]ethanesulphonic acid) ≥99.5% for biochemistry
Supplier: VWR Chemicals
441487MEA
387
EUR
441487M
441485H
44148BC
HEPES (2-[4-(2-hydroxyethyl)-1-piperazinyl]ethanesulphonic acid) ≥99.5% for biochemistry
HEPES (2-[4-(2-hydroxyethyl)-1-piperazinyl]ethanesulphonic acid)
Specification Test Results
Assay | Min. 99.5 % |
Appearance | White powder |
Appearance of solution (1 mol/l) | Clear colourless liquid |
IR Spectrum | Passes test |
pH (1 %) | 4.7 - 5.3 |
Ignition residue | Max. 0.3 % |
Water | Max. 0.5 % |
Cl (Chloride) | Max. 300 ppm |
PO4 (Phosphate) | Max. 10 ppm |
SO4 (Sulphate) | Max. 100 ppm |
Al (Aluminium) | Max. 5 ppm |
Cu (Copper) | Max. 5 ppm |
Fe (Iron) | Max. 5 ppm |
Na (Sodium) | Max. 0.1 % |
Pb (Lead) | Max. 5 ppm |
Absorbance (260 nm) (1 mol/l) | Max. 0.10 |
Absorbance (280 nm) (1 mol/l) | Max. 0.10 |
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