Potassium hydrogen phthalate ACS acidimetric standard

Supplier: Thermo Scientific Chemicals

42406-0025 42406-5000 424061000
TS42406-0025EA 419 USD
TS42406-0025 TS42406-5000 TS424061000
Potassium hydrogen phthalate ACS acidimetric standard
Potassium hydrogen phthalate
Formula: HOOCC₆H₄COOK
Melting Pt: 295…300 °C (dec.)
Storage Temperature: Ambient
MDL Number: MFCD00013070
CAS Number: 877-24-7
EINECS: 212-889-4
Merck Index: 13,07694
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Specification Test Results

Appearance White Crystalline powder or crystals
Infrared spectrum Conforms
pH 4.00 to 4.02 (0.05M at 25.0 +/- 0.2°C)
Titration with NaOH 99.95 to 100.05 % (On dried basis)
Chlorine compounds (as Cl) ≤0.003 %
Iron (Fe) ≤5 ppm
Sodium (Na) ≤0.005 %
Heavy metals (as Pb) ≤5 ppm
Sulfur compounds (as S) ≤0.002 %
Insoluble matter ≤0.005 %

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