产品名称
HEPES, ULTROL® Grade, ≥99% dry basis (titration), zwitterionic N-substituted aminosulfonic acid buffer
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)
SMILES string
OCCN1CCN(CC1)CCS(O)(=O)=O
InChI key
JKMHFZQWWAIEOD-UHFFFAOYSA-N
description
Merck USA index - 14, 4654
assay
≥99% dry basis (titration)
form
crystalline powder
manufacturer/tradename
Calbiochem®
storage condition
OK to freeze
color
white
useful pH range
6.8-8.2
pKa (25 °C)
7.5
solubility
water: 1 M
anion traces
chloride (Cl-): ≤0.01%
sulfate (SO42-): ≤0.05%
cation traces
Na: ≤0.1%
heavy metals: ≤1 ppm
shipped in
ambient
storage temp.
15-25°C
Quality Level
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Legal Information
ULTROL is a registered trademark of Merck KGaA, Darmstadt, Germany
CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany
Preparation Note
在复溶后存放于室温(20°C)。储备溶液在20°C下可稳定保存至多6个月。
General description
吸光度(1.0 M,H2O,260 nm):≤0.05。
吸光度(1.0 M,H2O,280 nm):≤0.04
吸光度(1.0 M,H2O,280 nm):≤0.04
两性离子N-取代氨基磺酸缓冲液。HEPES的最大缓冲能力非常接近哺乳动物组织液的pH值(37°C时pKa为7.31)。表现出无金属结合,并且具有较小的温度依赖性ΔpKa,为-0.014/°C。
Disclaimer
毒性:刺激性(B)
存储类别
13 - Non Combustible Solids
wgk
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
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