POTASSIUM HYDROGEN PHTHALATE VOLUMETRIC

General description

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.

Please visit ISO certificates and Site Quality Self-Assessments to access the current certificates of accreditation.

Download your certificate at http://www.sigma-aldrich.com to view certified values, including uncertainty and expiry date.

Application

It finds its use as a certified reference material (CRM) for the standardization of volumetric solutions in alkalimetric titrations, according to USP and Ph. Eur. It is also used to prepare a standard solution in determination of COD.

Features and Benefits

• Available as a solid in a secure glass bottle to ensure its stability for the entire shelf life until opened.
• Certified reference material according to ISO 17034
• High-purity material traceable to NIST SRMs
• Qualified in a DIN EN ISO/IEC 17025 accredited laboratory
• In accordance with the chapter reagents of USP and Ph. Eur
• High-quality offering accurate titer determinations
• Accompanied by a certificate of analysis (CoA)

Packaging

SKU-pack size numbers ending with a "3" are SmartChemicals with an RFID tag on the label for seamless data transfer to the instrument, e.g. xxxxxx1003 or xxxxxxx 4003. More information on www.sigmaaldrich.com/SmartChemicals

Legal Information

CERTIPUR is a registered trademark of Merck KGaA, Darmstadt, Germany

Molecular Weight: 204.22. Empirical Formula: C₈H₅KO₄. Agency: ISO 17025, reag. Ph. Eur., reag. USP. Quality Level: 300. 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. storage temp.: 15-25°C. InChI: 1S/C8H6O4.K/c9-7(10)5-3-1-2-4-6(5)8(11)12. /h1-4H,(H,9,10)(H,11,12). /q. +1/p-1. InChI key: IWZKICVEHNUQTL-UHFFFAOYSA-M. Storage Class Code: 11 - Combustible Solids. WGK: WGK 1. Flash Point(F): 387.1 °F - Pensky-Martens closed cup. Flash Point(C): 197.3 °C - Pensky-Martens closed cup.