Description

Potassium Phosphate Tribasic, Sesquihydrate (CAS No. 22763-04-8) is a high-purity inorganic salt widely used as a buffering agent and nutrient source. Its consistent quality and reliable performance make it a critical raw material for processes requiring precise pH control and phosphorus supplementation. This compound is essential for manufacturers in the pharmaceutical, food & beverage, and industrial water treatment sectors seeking a stable and soluble phosphate source.

Application

• Pharmaceutical Buffer & Excipient: Used in the formulation of injectables, oral solutions, and tablets to maintain stable pH and as a source of potassium and phosphate ions.
• Food Additive (Nutrient & pH Regulator): Functions as an emulsifier, stabilizer, and nutrient fortifier (source of phosphorus and potassium) in processed foods and beverages.
• Industrial Water Treatment: Acts as a corrosion inhibitor and scale control agent in boiler water and cooling tower systems.
• Laboratory Reagent: Serves as a standard buffer component in analytical chemistry, microbiology, and molecular biology applications.
• Fertilizer & Agricultural Solutions: Provides a highly soluble source of potassium and phosphorus in specialty liquid fertilizers and hydroponic nutrient solutions.
• Detergent & Cleaning Formulations: Used as a builder to enhance cleaning efficiency by sequestering water hardness ions and maintaining alkalinity.

Basic Information

Product Name	Potassium Phosphate Tribasic, Sesquihydrate
CAS No.	22763-04-8
Molecular Formula	K3PO4·1.5H2O
Molecular Weight	266.31 g/mol
Synonyms	Tripotassium Phosphate Sesquihydrate; Tripotassium Orthophosphate Sesquihydrate; Potassium Phosphate Tribasic Hemihydrate; K3PO4·1.5H2O; TKP; Phosphoric Acid, Tripotassium Salt, Sesquihydrate; E340(iii)
EINECS	Contact for details

Quality Control

Our Potassium Phosphate Tribasic, Sesquihydrate is manufactured under a strict quality management system. We offer grades compliant with Food Chemical Codex (FCC) and pharmaceutical standards, ensuring suitability for sensitive applications. Every batch undergoes rigorous analytical testing, and a comprehensive Certificate of Analysis (COA) is available upon request to verify purity, identity, and conformance to specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture and caking.

Specification

Item	Specification
Appearance	White crystalline powder or granules
Identification (IR)	Conforms
Assay (K3PO4·1.5H2O)	≥ 98.0 %
pH (1% Solution)	11.5 - 12.5
Loss on Drying	9.0 - 11.0 %
Insoluble Matter	≤ 0.2 %
Heavy Metals (as Pb)	≤ 10 ppm
Arsenic (As)	≤ 3 ppm

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