POTASSIUM HYDROGEN PHTHALATE CERTIFIED S

General description

Certipur^® certified secondary standard reference buffers are used to precisely calibrate and monitor pH measurement instruments and buffer solutions. They are quality controlled and qualified in our ISO/IEC 17025 and ISO 17034 accredited calibration laboratories against certified primary standard reference materials (SRM) in compliance with DIN 19266, IUPAC, NIST, Ph. Eur and USP. Certipur^® reference materials offer maximum accuracy, reliability and convenience and help avoid costly repeat analyses.

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

Potassium hydrogen phthalate [KHP; pH(S) = 4.00₅ (25 °C)] is a certified secondary standard reference material used as a calibration buffer standard for pH instruments or pH electrodes.

Features and Benefits

• The product is delivered with a comprehensive, batch-specific Certificate of Analysis showing the relevant data for the quality management system.
• The pH value of this Certipur^® buffer solution is qualified using differential potentiometry with two platinum hydrogen electrodes against NIST & PTB primary reference materials [pH(S) = 4.00₅ (25 °C)].
• This buffer standard has a guaranteed shelf life of 4 years.
• Potassium hydrogen phthalate buffer is a Certified Reference Material (CRM) offered in neat format. Solution of this standard can be prepared in-house per instructions in European Pharmacopoeia (Ph. Eur. 2.2.3).
• Intended for extremely precise calibration, qualification and monitoring of pH instruments and routine assessment of their performance.

Legal Information

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

Molecular Weight: 204.22. Empirical Formula: C₈H₅KO₄. grade: certified reference material. Quality Level: 300. Agency: complies with DIN 19266. product line: Certipur^®. . potency: >. 3200 . mg/kg LD₅₀, oral (Rat). 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. application(s): environmental
food and beverages
general analytical
industrial qc
pharmaceutical. format: neat. 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: 13 - Non 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.