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60359

Sigma-Aldrich

Potassium phthalate monobasic

BioUltra, ≥99.5% (T)

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Synonym(s):
KHP, Phthalic acid monopotassium salt, Potassium biphthalate, Potassium hydrogen phthalate
Linear Formula:
HOOCC6H4COOK
CAS Number:
Molecular Weight:
204.22
Beilstein/REAXYS Number:
3637128
EC Number:
MDL number:
PubChem Substance ID:

product line

BioUltra

assay

≥99.5% (T)

form

powder or crystals

impurities

insoluble matter, passes filter test

loss

≤0.05% loss on drying, 110 °C

pH

3.5-5.0 (25 °C, 0.1 M in H2O)

mp

295-300 °C (dec.) (lit.)

solubility

H2O: 0.1 M at 20 °C, clear, colorless

anion traces

chloride (Cl-): ≤20 mg/kg
sulfate (SO42-): ≤50 mg/kg

cation traces

Al: ≤5 mg/kg
As: ≤0.1 mg/kg
Ba: ≤5 mg/kg
Bi: ≤5 mg/kg
Ca: ≤10 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤5 mg/kg
Li: ≤5 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Mo: ≤5 mg/kg
Na: ≤100 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Sr: ≤5 mg/kg
Zn: ≤5 mg/kg

absorption

cut-off at 309 nm in H2O at 0.1 M

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

InChI key

IWZKICVEHNUQTL-UHFFFAOYSA-M

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1 of 4

This Item
PX1476NIST21851.01965
vibrant-m

60359

Potassium phthalate monobasic

Premium Grade
vibrant-m

PX1476

Potassium Hydrogen Phthalate

-
vibrant-m

NIST2185

Potassium hydrogen phthalate

-
vibrant-m

1.01965

Potassium hydrogen phthalate

-
Quality Level

200

Quality Level

200

Quality Level

100

Quality Level

300

product line

BioUltra

product line

-

product line

-

product line

Certipur®

impurities

insoluble matter, passes filter test

impurities

≤0.002% Sulfur compounds (as S), ≤0.005% Insoluble matter

impurities

-

impurities

-

pH

3.5-5.0 (25 °C, 0.1 M in H2O)

pH

4.0 (20 °C, 50 g/L in H2O)

pH

-

pH

4.0 (20 °C, 50 g/L in H2O)

solubility

H2O: 0.1 M at 20 °C, clear, colorless

solubility

80 g/L

solubility

-

solubility

80 g/L

Application

Potassium hydrogen phthalate may be used as a buffering agent or as a standard for total organic carbon (TOC) calibration and may be used to asses the oxidating activity of CNTs/TiO(2) photoanodes. Potassium hydrogen phthalate solution may be used as a liquid filter to reduce the effects of Rayleigh scattering on collected Raman spectra.

Storage Class

13 - Non Combustible Solids

wgk_germany

WGK 3

flash_point_f

387.1 °F - Pensky-Martens closed cup

flash_point_c

197.3 °C - Pensky-Martens closed cup

ppe

Eyeshields, Gloves, type N95 (US)


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