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Merck
CN

60220-M

磷酸二氢钾 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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关于此项目

线性分子式:
KH2PO4
化学文摘社编号:
7778-77-0
分子量:
136.09
NACRES:
NA.21
PubChem Substance ID:
329758828
UNSPSC Code:
12352302
EC Number:
231-913-4
MDL number:
MFCD00011401
Assay:
99.5-100.5%
Form:
crystalline
Solubility:
water: soluble (208 g/l at 20 °C (68 °F))

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产品名称

磷酸二氢钾 一元, buffer substance, anhydrous, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., 99.5-100.5%

InChI key

GNSKLFRGEWLPPA-UHFFFAOYSA-M

InChI

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

SMILES string

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

grade

ACS reagent
anhydrous
puriss. p.a.

agency

reag. ISO
reag. Ph. Eur.

assay

99.5-100.5%

form

crystalline

impurities

≤0.001% total nitrogen (N)

loss

≤0.2% loss on drying, 105 °C

pH

4.2-4.5 (20 °C, 5%)

pKa (25 °C)

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

bp

>450 °C

mp

252.6 °C (lit.)

solubility

water: soluble (208 g/l at 20 °C (68 °F))

density

2.338 g/mL at 25 °C (lit.)

anion traces

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

cation traces

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)

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Application

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.

General description

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

存储类别

11 - Combustible Solids

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

法规信息

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分析证书(COA)

Lot/Batch Number
SDBB4177
SDBB6409
SDBB5695
SDBB5058
SDBB5060

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