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Merck
CN

60220-M

Sigma-Aldrich

磷酸钾 一元

buffer substance, anhydrous, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., 99.5-100.5%

别名:

prim.-磷酸钾, 磷酸二氢钾

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About This Item

线性分子式:
KH2PO4
CAS号:
分子量:
136.09
EC 号:
MDL编号:
UNSPSC代码:
12352302
PubChem化学物质编号:
NACRES:
NA.21
方案:
99.5-100.5%
表单:
crystalline

等级

ACS reagent
anhydrous
puriss. p.a.

Agency

reag. ISO
reag. Ph. Eur.

方案

99.5-100.5%

表单

crystalline

杂质

≤0.001% total nitrogen (N)

缺失

≤0.2% loss on drying, 105 °C

pH值(酸碱度)

4.2-4.5 (20 °C, 5%)

pKa (25 °C)

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

沸点

>450 °C

mp

252.6 °C (lit.)

密度

2.338 g/mL at 25 °C (lit.)

痕量阴离子

chloride (Cl-): ≤5 mg/kg
sulfate (SO42-): ≤30 mg/kg

痕量阳离子

As: ≤0.5 mg/kg
Ca: ≤10 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤15 mg/kg
Cu: ≤5 mg/kg
Fe: ≤5 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Na: ≤50 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Zn: ≤5 mg/kg
heavy metals: ≤0.001% (by ICP-OES)

SMILES字符串

[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

Potassium phosphate monobasic is a soluble salt employed as heterogeneous catalyst, additive, fungicide, buffer, and plant fertilizer.

应用

Potassium phosphate monobasic can be used as a catalyst:
  • In the regioselective monobromination of aralkyl ketones to synthesize monobrominated ketones.
  • To synthesize acridine-1,8-diones and hexahydroquinolines via Hantzsch type reaction.
It can also be used as an additive in the oxidation of alcohols to aldehydes. The role of KH2PO4 was to regulate the pH of the solution, which affected the rate at which hydroxyl radicals were generated. As a result, the reaction′s selectivity was improved.

储存分类代码

11 - Combustible Solids

WGK

WGK 1

闪点(°F)

Not applicable

闪点(°C)

Not applicable

法规信息

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Lot/Batch Number

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