Description

Potassium Phosphate Tribasic Trihydrate is a high-purity inorganic salt widely utilized as a buffering agent and nutrient source. Its consistent quality and reliable performance make it a critical raw material for applications demanding precise pH control and phosphorus supplementation. This compound is essential for manufacturers in the pharmaceutical, food & beverage, and industrial water treatment sectors seeking a dependable and compliant ingredient.

Application

• Pharmaceutical Buffer & Excipient: Used in the formulation of injectable solutions, oral medications, and biological buffers to maintain stable pH.
• Food Additive (FCC Grade): Functions as an emulsifier, stabilizer, and nutrient supplement in processed foods and beverages.
• Industrial Water Treatment: Acts as a corrosion inhibitor and scale control agent in boiler water and cooling tower systems.
• Fertilizer & Agricultural Solutions: Serves as a source of both potassium and phosphorus in specialty liquid fertilizers and nutrient solutions.
• Laboratory Reagent: Employed in molecular biology and biochemistry for preparing buffer solutions like PBS (Phosphate-Buffered Saline).
• Cleaning & Detergent Formulations: Used as a builder to enhance cleaning efficiency by sequestering water hardness ions.

Basic Information

Product Name	Potassium Phosphate Tribasic Trihydrate
CAS No.	22763-03-7
Molecular Formula	K3PO4·3H2O
Molecular Weight	266.31 g/mol
Synonyms	Tripotassium phosphate trihydrate; Potassium phosphate tribasic trihydrate; Tripotassium orthophosphate trihydrate; K3PO4·3H2O; Phosphoric acid, tripotassium salt, trihydrate; TKPP trihydrate; FCC Potassium Phosphate Tribasic; Tripotassium Phosphate (Trihydrate)
EINECS	231-907-1 (for the anhydrous form)

Quality Control

Our Potassium Phosphate Tribasic Trihydrate is manufactured under a strict quality management system. Products are tested to meet relevant specifications for USP-NF, FCC, and ACS grades, ensuring suitability for high-demand applications. Each batch is accompanied by a comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles, available upon request.

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). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	White crystalline powder or granules
Identification (IR)	Conforms
Assay (K3PO4·3H2O)	≥ 98.0 %
pH (1% Solution)	11.5 - 12.5
Loss on Drying	19.0 - 21.0 %
Insoluble Matter	≤ 0.05 %
Chloride (Cl)	≤ 0.005 %
Sulfate (SO4)	≤ 0.02 %
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.