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60359 Sigma-Aldrich

Potassium phthalate monobasic

BioUltra, ≥99.5% (T)

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

  • CAS Number 877-24-7

  • Linear Formula HOOCC6H4COOK

  • Molecular Weight 204.22

  •  Beilstein/REAXYS Number 3637128

  •  EC Number 212-889-4

  •  MDL number MFCD00013070

  •  PubChem Substance ID 57651755

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Properties

Related Categories Alphabetical, BioUltra Buffers, Biochemicals and Reagents, Biological Buffers
Quality Level   200
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

Description

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.

Safety & Documentation

Safety Information

Personal Protective Equipment 
RIDADR 
NONH for all modes of transport
WGK Germany 
WGK 2
RTECS 
CZ4326000
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable

Documents

Certificate of Analysis (COA)

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Single- & multi-channel pipettes from BRAND
Protocols & Articles

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Peer-Reviewed Papers
15

References

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