羟乙基哌嗪乙硫磺酸，HEPES, Free Acid, ULTROL® Grade；A zwitterionic N-substituted aminosulfonic acid buffer. Useful in the pH 6.8-8.2 range. Has a pKa of 7.48 at 25°C. Absorbance (1.0 M, H2O, 260 nm):≤0.05.

质量水平

100

测定

≥99% dry basis (titration)

形式

crystalline powder

manufacturer/tradename

Calbiochem^®

储存条件

OK to freeze

颜色

white

useful pH range

6.8-8.2

pKa (25 °C)

7.5

溶解性

water: 1 M

痕量阴离子

chloride (Cl^-): ≤0.01%
sulfate (SO₄^2-): ≤0.05%

痕量阳离子

Na: ≤0.1%
heavy metals: ≤1 ppm

运输

ambient

储存温度

15-25°C

SMILES string

OCCN1CCN(CC1)CCS(O)(=O)=O

InChI

1S/C8H18N2O4S/c11-7-5-9-1-3-10(4-2-9)6-8-15(12,13)14/h11H,1-8H2,(H,12,13,14)

InChI key

JKMHFZQWWAIEOD-UHFFFAOYSA-N