Description

Potassium Phosphate Tribasic, Heptahydrate is a high-purity, crystalline inorganic salt widely used as a buffering agent and nutrient source. Its consistent quality and reliable performance make it a critical raw material for industries requiring precise pH control and phosphorus supplementation. This product is essential for manufacturers in the pharmaceutical, food & beverage, and agricultural sectors, where it serves as a key ingredient in buffer solutions, food additives, and fertilizer formulations.

Application

• Pharmaceutical Buffer Systems: Used in the formulation of parenteral solutions, ophthalmic preparations, and cell culture media to maintain stable pH.
• Food Additive (E340(iii)): Functions as an emulsifier, stabilizer, and sequestrant in processed foods, dairy products, and beverages.
• Fertilizer & Plant Nutrition: Provides a highly soluble source of potassium and phosphorus in liquid fertilizers and hydroponic nutrient solutions.
• 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 and buffer component in analytical chemistry and biochemical research.
• Detergent & Cleaning Formulations: Used as a builder to enhance cleaning efficiency by sequestering water hardness ions.

Basic Information

Product Name	Potassium Phosphate Tribasic, Heptahydrate
CAS No.	22763-02-6
Molecular Formula	K3PO4·7H2O
Molecular Weight	338.31 g/mol
Synonyms	Tripotassium Phosphate Heptahydrate; Potassium Phosphate Tribasic Heptahydrate; Tripotassium Orthophosphate Heptahydrate; TKP; K3PO4·7H2O; E340(iii); Phosphoric Acid, Tripotassium Salt, Heptahydrate
EINECS	Contact for details

Quality Control

Our Potassium Phosphate Tribasic, Heptahydrate is manufactured under a rigorous quality management system. Each batch is tested to ensure it meets stringent specifications for identity, purity, and composition. We can supply material compliant with various standards, including Food Chemical Codex (FCC) and pharmaceutical-grade requirements. A comprehensive Certificate of Analysis (COA) is provided with every shipment to guarantee traceability and compliance.

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 to prevent absorption of atmospheric moisture and caking.

Specification

Item	Specification
Appearance	White crystalline powder
Identification (IR)	Conforms
Assay (K3PO4·7H2O)	≥ 98.0 %
pH (1% Solution)	11.5 - 12.5
Loss on Drying	35.0 - 40.0 %
Insoluble Matter	≤ 0.05 %
Chloride (Cl)	≤ 0.01 %
Sulfate (SO4)	≤ 0.05 %
Heavy Metals (as Pb)	≤ 10 ppm

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