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CAS No 877-24-7 , potassium Search by region : China

  • Name: potassium
  • Synonyms: Potassium acid phthalate; 877-24-7; Monopotassium phthalate;potassium; Hydrogen potassium phthalate; Potassium biphthalate;Potassium hydrogen phthalate;2-carboxybenzoate;
  • CAS Registry Number:
  • Transport: UN 1789 8/PG 3
  • Melting Point: 295-300 ºC
  • Flash Point: 196.7°C
  • Boiling Point: 378.3°C at 760 mmHg
  • Density: 1.006 g/mL at 20 °C
  • Water Solubility: 80 G/L (20 ºC)
  • Safety Statements: Moderately toxic by ingestion and skin contact. When heated to decomposition it emits acrid smoke and irritating vapors.
  • Hazard Symbols: Xi: Irritant;C: Corrosive;
  • Flash Point: 196.7°C
  • EINECS: 212-889-4
  • Molecular Weight: 204.2212
  • InchiKey: IWZKICVEHNUQTL-UHFFFAOYSA-M
  • InChI: 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
  • Risk Statements: S22;S24/25
  • Molecular Formula: C8H5KO4
  • Molecular Structure:CAS No:877-24-7 potassium

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877-24-7 Potassium biphthalate

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References of potassium
Title: Potassium Biphthalate
CAS Registry Number: 877-24-7
CAS Name: Phthalic acid potassium acid salt
Synonyms: potassium acid phthalate; potassium hydrogen phthalate; acid potassium phthalate
Molecular Formula: C8H5KO4
Molecular Weight: 204.22
Percent Composition: C 47.05%, H 2.47%, K 19.15%, O 31.34%
Line Formula: HOOCC6H4COOK
Literature References: Prepd by half-neutralization of a phthalic anhydride soln: F. J. Welcher, Organic Analytical Reagents vol. 2 (Van Nostrand, New York, 1947) pp 75-79.
Properties: Orthorhombic crystals, stable in air. d425 1.636. Acid reaction; pH of 0.05M aq soln at 25° = 4.005 (glass electrode). Sol in about 12 parts cold water, 3 parts boiling water; slightly sol in alcohol.
Density: d425 1.636
Use: As primary standard for preparing volumetric alkali solns, also as a buffer in pH determinations.