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Merck

179922

Sigma-Aldrich

Kaliumphthalat, einbasisch

ACS reagent, acidimetric standard

Synonym(e):

KHP, Kaliumbiphthalat, Kaliumhydrogenphthalat, Phthalsäure Kaliumsalz

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About This Item

Lineare Formel:
HOOCC6H4COOK
CAS-Nummer:
Molekulargewicht:
204.22
Beilstein:
3637128
EG-Nummer:
MDL-Nummer:
UNSPSC-Code:
12352100
PubChem Substanz-ID:
NACRES:
NA.21

Qualität

ACS reagent
acidimetric standard

Qualitätsniveau

Assay

99.95-100.05% dry basis

Form

crystals

Verunreinigungen

≤0.002% S compounds
≤0.003% Cl compounds
≤0.005% insolubles

pH-Wert

4.00-4.02 (25.0 °C±0.2 °C, 0.05 M)

mp (Schmelzpunkt)

295-300 °C (dec.) (lit.)

Kationenspuren

Fe: ≤5 ppm
Na: ≤0.005%
heavy metals: ≤5 ppm (by ICP)

SMILES String

[K+].OC(=O)c1ccccc1C([O-])=O

InChI

1S/C8H6O4.K/c9-7(10)5-3-1-2-4-6(5)8(11)12;/h1-4H,(H,9,10)(H,11,12);/q;+1/p-1

InChIKey

IWZKICVEHNUQTL-UHFFFAOYSA-M

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Verwandte Kategorien

Anwendung

Potassium phthalate monobasic may be used as a primary standard in acidimetric titration and also to prepare potassium phthalate buffer solution for pH calibration.

Lagerklassenschlüssel

13 - Non Combustible Solids

WGK

WGK 1

Flammpunkt (°F)

387.1 °F - Pensky-Martens closed cup

Flammpunkt (°C)

197.3 °C - Pensky-Martens closed cup

Persönliche Schutzausrüstung

Eyeshields, Gloves, type N95 (US)


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