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60153 Sigma-Aldrich

Potassium citrate tribasic monohydrate

purum p.a., ≥99.0% (NT)

Synonym: Citric acid tripotassium salt, Tripotassium citrate

  • CAS Number 6100-05-6

  • Linear Formula HOC(COOK)(CH2COOK)2 · H2O

  • Molecular Weight 324.41

  •  Beilstein Registry Number 3924344

  •  EC Number 231-905-0

  •  MDL number MFCD00150442

  •  PubChem Substance ID 57651729



Related Categories Biochemicals and Reagents, Biological Buffers, Buffers A to Z, Essential Chemicals, Potassium Salts,
grade   purum p.a.
assay   ≥99.0% (NT)
pH   7.5-9.0 (25 °C, 50 mg/mL in H2O)
mp   275 °C (dec.)(lit.)
solubility   H2O: soluble0.5 g/10 mL, clear, colorless
anion traces   chloride (Cl-): ≤50 mg/kg
  sulfate (SO42-): ≤50 mg/kg
cation traces   Ca: ≤50 mg/kg
  Cd: ≤50 mg/kg
  Co: ≤50 mg/kg
  Cu: ≤50 mg/kg
  Fe: ≤50 mg/kg
  Na: ≤1500 mg/kg
  Ni: ≤50 mg/kg
  Pb: ≤50 mg/kg
  Zn: ≤50 mg/kg



Potassium citrate tribasic monohydrate (tribasic potassium citrate) may be added as a promoter during the preparation of activated carbon-supported CuCl2 + PdCl2 + NaOH catalyst. This catalyst was employed for the conversion of ethanol to diethyl carbonate (DEC).1 It may be used to compose the fermentation medium for Aspergillus niger 72-4. It may be used as a standard to investigate the influence of Bergenia ligulata rhizome (BLR) on CaC2O4 crystallization.

General description

Potassium citrate tribasic monohydrate is the tripotassium salt of citric acid. It has been proposed as a promising organic salt for the formation of aqueous two-phase system (ATPS). UCON (temperature-responsive polymer) + potassium citrate ATPS has been studied.

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Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 
Protocols & Articles

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