Potassium hydrogen phthalate 99.95-100.05% ACS primary standard

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

33351-A1 33351-30 33351-30 33351-A1
CAAA33351-30EA 109.18 CAD
CAAA33351-30 AA33351-30 CAAA33351-A1 AA33351-A1
Potassium hydrogen phthalate 99.95-100.05% ACS primary standard
Potassium hydrogen phthalate

As a primary standard for preparing volumetric alkali solutions and as a buffer in pH determinations

Formula: HOOCC₆H₄COOK
MW: 204.22 g/mol
Melting Pt: 297 °C (dec.)
Density: 1.636
MDL Number: MFCD00013070
CAS Number: 877-24-7
Merck Index: 14,7612
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Specification Test Results

Insoluble matter 0.005
pH of a 0.05M solution 4.0 at 25°
Cl 0.003%
S 0.002%
Heavy Metals (as Pb) 5 ppm
Fe 5 ppm
Na 0.00005

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