商品詳情
HEPES High Purity grade [4-(2-Hydroxyethyl) piperazine-1-ethanesulfonic acid] | ||||
C8H18N2O4S | MW 238.31 | Cas # 7365-45-9 | Assay: 99.5% | |
PKa at 20℃: 7.4-7.7 | Residue on Ignition: ≤ 0.1% | Sulfate: ≤ 0.05% | ||
Loss on drying (105℃, 3 hours): ≤ 1% | Heavy metals(Pb): ≤ 5 ppm | |||
UV absorbance (260 nm; 280 nm; 440 nm): ≤ 0.5 Abs unit; ≤ 0.5 Abs unit; ≤ 0.2 Abs unit | ||||
Color (1 M solution): Pass test | Free flowing white powder. |