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795488

Sigma-Aldrich

磷酸钾 一元

anhydrous, free-flowing, Redi-Dri, ACS reagent, ≥99%

Synonym(s):
prim.-磷酸钾, 磷酸二氢钾
Linear Formula:
KH2PO4
CAS Number:
Molecular Weight:
136.09
EC 号:
MDL编号:
PubChem化学物质编号:

等级

ACS reagent
anhydrous

质量水平

200

产品线

Redi-Dri

测定

≥99%

形式

powder

质量

free-flowing

杂质

≤0.01% Insoluble matter

缺失

≤0.2% loss on drying, 105°C

pH值(酸碱度)

4.1-4.5 (25 °C, 5%)

pKa (25 °C)

(1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)

mp

252.6 °C (lit.)

密度

2.338 g/mL at 25 °C (lit.)

痕量阴离子

chloride (Cl-): ≤0.001%
sulfate (SO42-): ≤0.003%

痕量阳离子

Fe: ≤0.002%
Na: ≤0.005%
heavy metals: ≤0.001% (by ICP)

SMILES string

[K+].OP(O)([O-])=O

InChI

1S/K.H3O4P/c;1-5(2,3)4/h;(H3,1,2,3,4)/q+1;/p-1

InChI key

GNSKLFRGEWLPPA-UHFFFAOYSA-M

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一般描述

磷酸二氢钾(正磷酸一钾)是水溶无机盐。它形成的标准焓是 −376.1 kcalmol-1。它是合成偏磷酸钾的起始物质。

应用

磷酸二氢钾用于制备磷酸缓冲液和磷酸盐缓冲液(PBS)。它还可以用来制备 PEG1000(聚乙二醇)/磷酸钾水二相体系(ATPS)。

包装

500 g in poly bottle
1, 2.5 kg in poly bottle

特点和优势

  • 提高效率——免除需要松散硬化粉末的时间和精力
  • 更加安全——避免使用工具大力敲碎团块的风险
  • 更加经济——制备和溶剂化速度更快,提高效率并节约成本
  • 质量保证——经过专业检测的出色品质,无抗结剂添加
  • 灵活的用量选择——有从研究到放大级别的用量规格可供选择

法律信息

Redi-Dri is a trademark of Sigma-Aldrich Co. LLC

储存分类代码

13 - Non Combustible Solids

WGK

WGK 1

Certificate of Analysis

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Certificate of Origin

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