Potassium Citrate Powder
Overview
Potassium Citrate Powder is a potassium salt of citric acid with extensive applications across industries. As a white, odorless crystalline powder, it serves as a multifunctional compound in food processing, pharmaceutical formulations, and technical applications. The substance is classified as generally recognized as safe (GRAS) by regulatory agencies when used appropriately. Its alkaline nature and excellent solubility make it particularly valuable as a pH regulator and buffering agent in various systems.
Physical and Chemical Properties
The powder exhibits high water solubility (590 g/L at 20°C) with a slightly alkaline pH in solution (typically 7.5-9.0). Its molecular structure contains three potassium ions for each citrate molecule, contributing to its ionic character and reactivity. Key characteristics include hygroscopicity (moisture absorption tendency) and thermal decomposition around 180°C rather than melting. The compound demonstrates good stability under normal conditions but may react with strong acids or oxidizing agents.
Main Applications
In the food industry, Potassium Citrate Powder functions as an acidity regulator (E332) in beverages, dairy products, and processed foods. It prevents crystallization and enhances flavor stability in various formulations. Pharmaceutical applications include use as an alkalizing agent in medications for urinary conditions and as an excipient in effervescent tablets. Industrial uses encompass water treatment, electroplating solutions, and as a chelating agent in cleaning products.
Safety and Storage
While generally safe, proper handling includes avoiding dust formation and using protective equipment when processing large quantities. The powder may cause mild irritation to eyes, skin, or respiratory tract upon direct contact. Storage requires airtight containers in cool, dry environments (below 25°C recommended) to prevent moisture absorption and caking. Separation from strong acids and oxidizers is essential to prevent hazardous reactions.
B2B Procurement Guide
Industrial buyers should specify required grade (food, pharmaceutical, or technical) and verify relevant certifications (e.g., USP, BP, FCC). Moisture content (typically <1% for premium grades) significantly affects flow properties and shelf life. Consider packaging options (multi-layer bags with moisture barriers) and minimum order quantities when sourcing. Reputable suppliers should provide batch analysis certificates and material safety data sheets (MSDS) with each shipment.
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