Description

Potassium Phthalate (2:1) is a high-purity potassium salt of phthalic acid, commonly recognized by its CAS number 29801-94-3. This compound serves as a critical reagent and intermediate in analytical chemistry and specialty synthesis, valued for its consistent reactivity and defined stoichiometry. It is primarily required by manufacturers and R&D laboratories in the pharmaceutical, analytical reagent, and fine chemical sectors for precise formulation and quality control processes.

Application

• Primary Standard in Analytical Chemistry: Used for the standardization of acids and bases in titrimetric analysis due to its high purity and stability.
• Pharmaceutical Intermediate: Acts as a key building block in the synthesis of more complex active pharmaceutical ingredients (APIs) and excipients.
• Buffer Component: Employed in the preparation of precise pH buffer solutions for laboratory and industrial processes.
• Polymer & Resin Production: Serves as a monomer or catalyst component in the manufacture of certain polyesters and specialty polymers.
• Research & Development: Utilized in chemical research for method development, calibration, and as a reference material.
• Electrolyte & Electroplating: Finds application in specific electrochemical processes and plating bath formulations.

Basic Information

Product Name	Potassium Phthalate (2:1)
CAS No.	29801-94-3
Molecular Formula	C8H5KO4 • 1/2H2O (common hydrate)
Molecular Weight	204.22 g/mol (Anhydrous basis)
Synonyms	Potassium Hydrogen Phthalate; Potassium Biphthalate; KHP; Phthalic Acid Monopotassium Salt; 1,2-Benzenedicarboxylic Acid, Monopotassium Salt; Acid Potassium Phthalate; Potassium Acid Phthalate; Potassium Phthalate Monobasic
EINECS	Contact for details

Quality Control

Our Potassium Phthalate (2:1) is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets high-purity standards suitable for use as a primary standard and in sensitive applications. Certificates of Analysis (COA) detailing purity, assay, and impurity profiles are provided with every shipment to guarantee traceability and compliance with your specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent absorption of atmospheric moisture, which can affect purity and weight.

Specification

Item	Specification
Appearance	White crystalline powder
Identification (IR)	Conforms
Assay (as KHP)	≥ 99.5%
pH (5% solution)	3.8 - 4.2
Loss on Drying	≤ 0.2%
Heavy Metals (as Pb)	≤ 10 ppm
Chloride (Cl)	≤ 50 ppm
Sulfate (SO4)	≤ 100 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.