Potassium phosphate monobasic, Meets analytical specificatio

Name: Potassium phosphate monobasic
Synonymns: Monopotassium phosphate; Potassium dihydrogen phosphate; prim.-Potassium phosphate
Description: Meets analytical specification of NF, Ph. Eur., E340, Anhydrous, 98-100.5% (calc. to the dried substance)

Container Type: Plastic Bottle

Molar Mass: 136.09 g/mol

Empirical Formula: H₂KO₄P
Linear Formula: KH₂PO₄

CAS Number: 7778-77-0
EC Number: 231-913-4
MDL Number: MFCD00011401

SPECIFICATIONS

Assay (calculated to the dried substance): 98.0 - 100.5 %
Loss on drying (130°C): max. 1.0 %
Loss on drying (105°C, 4 h): max. 1.0 %
Water insoluble matter: max. 0.2 %
pH (5 %, 20°C): 4.2 - 4.5
Arsenic (As): max. 1 ppm
Cadmium (Cd): max. 1 ppm
Copper (Cu): max. 0.002 %
Iron (Fe): max. 10 ppm
Mercury (Hg): max. 1 ppm
Sodium (Na): max. 0.1 %
Lead (Pb): max. 1 ppm
Zinc (Zn): max. 0.002 %
Heavy metals (as Pb): max. 10 ppm
Chloride (Cl): max. 10 ppm
Fluoride (F): max. 10 ppm
Sulfate (SO₄): max. 200 ppm
KMnO₄ reducing matter (as O): max. 0.04 %
Appearance of the solution: complying
Residual solvents: complying



PHYSICAL PROPERTIES

pKa (25 °C): (1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)

Freezing Point: 253 °C
Density: 2.34 g/cm3

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