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Potassium Hydrogen Phthalate 99.8% AR Grade Reagent

Cas Number:877-24-7
Formula:C8H5KO4
Molar Mass:204.22
EC Number:212-889-4

Quantity:
  • AR
  • LABOR
  • 140702129

Potassium Hydrogen Phthalate 99.8% AR Grade Reagent


Cas Number:877-24-7

Formula:C8H5KO4

Molar Mass:204.22

EC Number:212-889-4


Physicochemical properties:

Colorless monoclinic crystal or white crystalline powder. It is stable in the air and dissolved in about 12 parts of cold water, 3 parts of boiling water, slightly soluble in ethanol. The solution is acidic. The pH of the 0.05 mol/L aqueous solution at 25 ° C is 4.005. The relative density (d254) is 1.636. The melting point is 295 ~ 300 ° C (decomposition).


Usage:

Analytical reagents. Benchmark the base. Prepare the buffer solution.


Packing:

500g/25kg




Item of Analysis

Standard

Assay,%

99.8 min

pH(50g/L,25℃)

3.8~4.2

Transparency of solution

4 max

Insoluble in water,%

0.005 max

Loss on drying,%

0.05 max

Chloride(Cl),%

0.002 max

sulfur compounds(as SO4),%

0.006 max

Sodium(Na),%

0.01 max

Iron(Fe),%

0.0005 max

Heavy metals(as Pb),%

0.0005 max


Not a hazardous substance or mixture.


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