Potassium Carbonate CAS 584-08-7

2.Physical and Chemical Properties

• Appearance: White granular powder or crystalline solid
• Melting point: Approximately 891 °C
• Density: Approximately 2.43 g/cm³
• Solubility: Highly soluble in water (about 111 g/100 mL at 20 °C, with evolution of heat); practically insoluble in ethanol, ether and acetone
• pH of aqueous solution: Strongly alkaline (a 10% solution has a pH of approximately 11.5) Hygroscopicity: Hygroscopic and deliquescent; absorbs moisture and CO2 from air Stability: Chemically stable; strongly alkaline; store sealed in a dry place

3.Main Functions and Applications (What are its uses?)

• Glass and ceramics (core application): A key source of K2O for special glass, optical glass, cathode-ray-tube (CRT) glass, and ceramic glazes, improving transparency, thermal stability and surface gloss.
• Potassium salt production: The principal raw material for manufacturing potassium bicarbonate, potassium hydroxide and a wide range of other potassium salts.
• Food additive: Used as a leavening agent and acidity regulator (E501) in baked goods and cocoa processing.
• Agriculture: Serves as a water-soluble potassium fertilizer and soil conditioner, supplying potassium without chloride.
• Detergents and soaps: Acts as a builder and water softener, enhancing cleaning efficiency in hard water. Pharmaceutical: Employed as a raw material and as an antacid / buffering agent in certain formulations. Dyes, pigments and textiles: Applied in dyeing, printing and pigment manufacture as an alkali agent.
• Rubber and metallurgy: Used in rubber processing and in ore flotation for mineral beneficiation.
• CO2 absorbent: Utilized as a carbon dioxide absorbent and for greenhouse CO2 fertilization in protected cultivation.

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