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60359

Sigma-Aldrich

Potassium phthalate monobasic

BioUltra, ≥99.5% (T)

Synonym(s):

KHP, Phthalic acid monopotassium salt, Potassium biphthalate, Potassium hydrogen phthalate

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About This Item

Linear Formula:
HOOCC6H4COOK
CAS Number:
877-24-7
Molecular Weight:
204.22
Beilstein:
3637128
EC Number:
212-889-4
MDL number:
MFCD00013070
UNSPSC Code:
12161700
PubChem Substance ID:
57651755
NACRES:
NA.21
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product line

BioUltra

Quality Level

200

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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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 Code

13 - Non Combustible Solids

WGK

WGK 3

Flash Point(F)

387.1 °F - Pensky-Martens closed cup

Flash Point(C)

197.3 °C - Pensky-Martens closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
BCCM9506
BCCM0533
BCCL1399
BCCJ9524
BCCJ4646

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Journal of chromatography. A, 1268, 16-21 (2012-11-07)
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Environmental science & technology, 47(2), 958-967 (2012-12-14)
Urinary phthalate excretion is used as marker of phthalate exposure in epidemiological studies. Here we examine the reliability of urinary phthalate levels in exposure classification by comparing the inter- and intrasubject variation of urinary phthalate metabolite levels. Thirty-three young healthy
Martha M Téllez-Rojo et al.
The Science of the total environment, 461-462, 386-390 (2013-06-12)
Previous studies suggest that prenatal phthalate exposure affects neurodevelopment and behavior during the first years of life. To evaluate the effect of maternal urinary concentrations of phthalate metabolites during pregnancy on mental and psychomotor development in children 24-36 months of
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