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Merck

60130

Sigma-Aldrich

氯化钾

puriss. p.a., ≥99.5% (AT)

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About This Item

线性分子式:
KCl
CAS号:
分子量:
74.55
EC號碼:
MDL號碼:
分類程式碼代碼:
12352302
PubChem物質ID:
NACRES:
NA.21

等級

puriss. p.a.

品質等級

化驗

≥99.5% (AT)

形狀

powder or crystals

雜質

≤0.001% total nitrogen (N)

pH值

5.5-8.0 (20 °C, 50 mg/mL in H2O)

mp

770 °C (lit.)

密度

1.98 g/mL at 25 °C (lit.)

負離子痕跡

bromide (Br-): ≤700 mg/kg
iodide (I-): ≤20 mg/kg
phosphate (PO43-): ≤5 mg/kg
sulfate (SO42-): ≤30 mg/kg

正離子痕跡

Ca: ≤50 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤2 mg/kg
Mg: ≤10 mg/kg
Mn: ≤5 mg/kg
Na: ≤200 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Zn: ≤5 mg/kg

SMILES 字串

[Cl-].[K+]

InChI

1S/ClH.K/h1H;/q;+1/p-1

InChI 密鑰

WCUXLLCKKVVCTQ-UHFFFAOYSA-M

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一般說明

氯化钾属碱金属卤化物,为无色结晶盐。它在水中的溶解度与温度的升高成正比。它可以从氢氧化钾,通过中和反应与盐酸。已经描述了氯化钾在水中的溶液的焓的量热估计。

應用

氯化钾可用于制备肥料、氢氧化钾、碳酸钾和其他钾盐。可用于缓冲液去质子化(质子 H + 损失)过程中焓和热容值的量热测定。根据这些值,计算这些缓冲液 pH 值的温度依赖性。
可用于磷酸盐缓冲液制备,以及蛋白提取和溶解。

儲存類別代碼

13 - Non Combustible Solids

水污染物質分類(WGK)

WGK 1

閃點(°F)

Not applicable

閃點(°C)

Not applicable


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H Fukada et al.
Proteins, 33(2), 159-166 (1998-10-21)
Enthalpy and heat capacity changes for the deprotonation of 18 buffers were calorimetrically determined in 0.1 M potassium chloride at temperatures ranging from 5 to 45 degrees C. The values of the dissociation constant were also determined by means of
The use of potassium chloride and tris (hydroxymethyl) aminomethane as standard substances for solution calorimetry.
Rychly R and Pekarek V.
The Journal of Chemical Thermodynamics, 9(4), 391-396 (1977)
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