Potassium hydrogen phthalate, Certipur® Reag. Ph. Eur., Reag. USP volumetric standard, secondary reference material for alkalimetry, traceable to NIST Standard Reference Material (SRM), Supelco®

Supplier: MilliporeSigma

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

1.02400.0080 1.02400.0080 1.02400.0083
CA1.02400.0080EA 145.36 CAD
EM1.02400.0080 CA1.02400.0080 EM1.02400.0083
Potassium hydrogen phthalate, Certipur® Reag. Ph. Eur., Reag. USP volumetric standard, secondary reference material for alkalimetry, traceable to NIST Standard Reference Material (SRM), Supelco®
Potassium hydrogen phthalate

  • pH 4.0 (50 g/l, H₂O, 20 °C)


Merck have introduced into the range of Certipur® standards some packs with additional technology - Supelco® SmartTitrants that use an RFID tag to provide a seamless data transfer between the smart titrator and the RFID tag on the label of the bottle of titrant. It will ensure that all information needed for method execution, result calculation and documentation is transferred to the titrator equipped with this technology. MettlerToledo Compact and Excellence titrators include this technology. Please see ordering table below for packs with RFID tag.

Formula: HOOCC₆H₄COOK
MW: 204.22 g/mol
Melting Pt: 295…300 °C
Density: 1.636 g/cm³ (20 °C)
MDL Number: MFCD00013070
CAS Number: 877-24-7
Merck Index: 12,07773
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Specification Test Results

Solubility 80 g/l (20 °C)
Melting Point 295 - 300 °C
Molar Mass 204.22 g/mol
Bulk Density 900 kg/m3
Density 1.636 g/cm3
pH 4.0 (50 g/l, H2O, 20 °C)

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