1CAS No. 877-24-7 2Appearance: colorless orwhite crystalline powder 3purity:99.8 4suporting mixed batches 5EC No.212-889-4

Specifications for potassium hydrogen phthalate

1) Assay:                                99.8% min

2) ph(50g/L, 25C)                  3.8~4.2

3) Clarify experiment             Conform

4) Water insoluble                  0.005%

5) Loss on drying                    0.05%

6) Chloride(Cl)                        0.002%

7) Sulfate(SO4)                       0.006%

8) Sodium(Na)                        0.01%

9)Iron(Fe)                                0.0005%

10)Heavy Metal(Pb)               0.0005%

 Properties

PropertiesStructureHazards

Molecular formula	C8H5KO4
Molar mass	204.22 g mol−1
Appearance	White or colorless solid
Density	1.64 g/cm3, solid
Melting point	~295 °C (decomposes)
Solubility in water	25 g/100 ml
Acidity (pKa)	5.4
Coordinationgeometry	tetrahedral
MSDS	External MSDS
R-phrases	R36 R37 R38
Main hazards	Irritant to eyes, skin,and respiratory system
Flash point	Non-flammable

Potassium hydrogen phthalate KHP