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Potassium hydrogen phthalate, also known as KHP, is a volumetric standard manufactured under stringent conditions and measured with the highest possible precision. Its mass fraction is determined by potentiometric titration, and it is qualified in a DIN EN ISO/IEC 17025 accredited laboratory.
Agency
ISO 17025
reag. Ph. Eur.
Quality Level
form
solid
potency
>3200 mg/kg LD50, oral (Rat)
technique(s)
titration: suitable
pH
4.0 (20 °C, 50 g/L in H2O)
mp
295-300 °C
solubility
80 g/L
density
1.636 g/cm3
bulk density
900 kg/m3
Rp 3.098.000
Rp 1.534.000
Rp 3.250.000
Rp 2.197.000
Rp 2.057.000
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