Disodium Hydrogen Phosphate Anhydrous CAS 7558-79-4

2.Physical and Chemical Properties

• Appearance: Anhydrous - white powder; Dodecahydrate - colorless transparent crystals
• Melting point: Anhydrous decomposes at approximately 250 °C; dodecahydrate melts at approximately 35 °C (in its own water of crystallization)
• Density: Anhydrous about 1.7 g/cm³; dodecahydrate about 1.52 g/cm³
• Solubility: Soluble in water (anhydrous about 7.7 g/100 mL at 20 °C); insoluble in ethanol
• Aqueous solution: Alkaline (1% solution pH about 9.0)
• Stability: Anhydrous form is stable; dodecahydrate effloresces in air

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

• Food (core application): As a buffering agent, emulsifier and quality improver (E339), it is widely used in meat products (water retention and texture improvement), dairy products and beverages, stabilizing pH, enhancing mouthfeel and increasing yield.
• Water treatment: Serves as a water softener and corrosion-scale inhibitor in boiler water treatment, preventing scale deposition and metal corrosion.
• Pharmaceutical: Used as a saline laxative, pH regulator and electrolyte supplement in formulations and clinical rehydration.
• Fermentation: Acts as an excellent phosphorus source in microbial culture media, promoting the fermentation of yeast and antibiotics.
• Detergents: Used as a builder to improve cleaning performance.
• Analytical chemistry: A core component of phosphate-buffered saline (PBS), widely used in biochemical and pharmaceutical research.
• Electronics: Employed in the preparation of electronic-grade phosphates.

4.A Benchmark-Level Industrial Masterpiece - A Meticulously Crafted "Food-Grade" Buffering Phosphate!