Potassium hydrogen phthalate ACS acidimetric standard

Supplier: Thermo Scientific
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Synonyms: KHPPotassium phthalate monobasicPotassium Acid PhthalatePotassium biphthalatePhthalic Acid Monopotassium SaltPhthalic acid potassium salt

ACRO424061000EA 18.1 GBP
ACRO424061000 ACRO424065000 ACRO424060025
Potassium hydrogen phthalate ACS acidimetric standard
Potassium hydrogen phthalate
Formula: HOOCC₆H₄COOK
MW: 204.22 g/mol
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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