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60360 Sigma-Aldrich

Potassium phthalate monobasic

puriss. p.a., ≥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 Registry Number 3637128

  •  EC Number 212-889-4

  •  MDL number MFCD00013070

  •  PubChem Substance ID 329758904

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Properties

Related Categories Analytical Reagents, Analytical Reagents for General Use, Analytical/Chromatography, Essential Chemicals, O-P, Puriss p.a.,
InChI Key   IWZKICVEHNUQTL-UHFFFAOYSA-M
grade   puriss. p.a.
assay   ≥99.5% (T)
pH   4
mp   295-300 °C (dec.)(lit.)
anion traces   chloride (Cl-): ≤20 mg/kg
  sulfate (SO42-): ≤50 mg/kg
cation traces   Ca: ≤10 mg/kg
  Cd: ≤5 mg/kg
  Co: ≤5 mg/kg
  Cr: ≤5 mg/kg
  Cu: ≤5 mg/kg
  Fe: ≤5 mg/kg
  Mg: ≤5 mg/kg
  Mn: ≤5 mg/kg
  Na: ≤100 mg/kg
  Ni: ≤5 mg/kg
  Pb: ≤5 mg/kg
  Zn: ≤5 mg/kg

Description

General description

Potassium phthalate monobasic (KHP) is the monopotassium salt of pthalic acid. It has been proposed as a certified reference material (CRM) under ISO/IEC 17025 and ISO Guide 34 accreditation. Its spectral shift, multiplicity, solubility and relaxation times in different solvents have been reported.

Price and Availability

Suggested Laboratory Gloves


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Safety & Documentation

Safety Information

RIDADR 
NONH for all modes of transport
WGK Germany 
2
RTECS 
CZ4326000
Protocols & Articles
Peer-Reviewed Papers
15

References

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