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60130

Sigma-Aldrich

Potassio cloruro

puriss. p.a., ≥99.5% (AT)

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About This Item

Formula condensata:
KCl
Numero CAS:
7447-40-7
Peso molecolare:
74.55
Numero CE:
231-211-8
Numero MDL:
MFCD00011360
Codice UNSPSC:
12352302
ID PubChem:
329758757
NACRES:
NA.21

Grado

puriss. p.a.

Saggio

≥99.5% (AT)

Forma fisica

powder or crystals

Impurezze

≤0.001% total nitrogen (N)

pH

5.5-8.0 (20 °C, 50 mg/mL in H2O)

Punto di fusione

770 °C (lit.)

Densità

1.98 g/mL at 25 °C (lit.)

Anioni in tracce

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

Cationi in tracce

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

Stringa SMILE

[Cl-].[K+]

InChI

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

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Categorie correlate

Descrizione generale

Potassium chloride, an alkali metal halide, is a colorless crystalline salt. Its solubility in water is directly proportional to increase in temperature. It can be prepared from potassium hydroxide, via neutralization reaction with HCl. Calorimetric estimation of the enthalpy of solution of potassium chloride in water has been described.

Applicazioni

Potassium chloride may be used in the preparation of fertilizer, potassium hydroxide, potassium carbonate and other potassium salts. It may be used in the calorimetric determination of enthalpy and heat capacity values during the deprotonation (loss of proton H+) of buffers. From these values temperature dependence of the pH of these buffers was calculated.
Può essere usato per la preparazione del tampone fosfato salino e per l′estrazione e la solubilizzazione delle proteine.

Codice della classe di stoccaggio

13 - Non Combustible Solids

Classe di pericolosità dell'acqua (WGK)

WGK 1

Punto d’infiammabilità (°F)

Not applicable

Punto d’infiammabilità (°C)

Not applicable

Certificati d'analisi (COA)

Cerca il Certificati d'analisi (COA) digitando il numero di lotto/batch corrispondente. I numeri di lotto o di batch sono stampati sull'etichetta dei prodotti dopo la parola ‘Lotto’ o ‘Batch’.

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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)
H Fukada et al.
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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
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