Keywords: Trisodium phosphate, Sodium orthophosphate, 97% Trisodium phosphate, Industrial grade Trisodium phosphate, Food grade Trisodium phosphate
Trisodium phosphate (TSP, chemical formula Na₃PO₄), commonly known as sodium orthophosphate, is a white/colorless crystalline powder, strongly alkaline, and readily soluble in water, of an inorganic phosphate.
Aojin Chemical is a supplier of trisodium phosphate, offering high-quality 97% trisodium phosphate.
I. Core Functions (Principles)
Strong alkalinity and pH buffering: A 1% aqueous solution has a pH of approximately 11.5–12.0, stabilizing the pH of the system.
Chondration/softening: Forms precipitates or stable complexes with metal ions such as calcium, magnesium, and iron in water, softening hard water, inhibiting scale formation, and preventing interference from metal ions.
Emulsification/dispersion/detergent treatment: Emulsifies greases, disperses dirt, and prevents redeposition under alkaline conditions, possessing both degreasing and cleaning power.
Rust Prevention/Passivation: Forms a passivation film on steel surfaces, providing short-term rust prevention and improving coating adhesion.
Food-Grade Functions: Retains water, improves adhesion, stabilizes emulsions, prevents protein precipitation, and provides antioxidant and color-protecting properties.
II. Main Applications (by Field)
1. Industrial Water Treatment (Most Commonly Used)
Boiler/Circulating Water Softening and Scale Prevention: Chelates calcium and magnesium to inhibit and remove scale, improve thermal efficiency, and prevent corrosion.
Industrial Circulating Water/Cooling Water: Prevents scale buildup on heat exchangers and pipes, stabilizing water quality.
Heavy Metal Wastewater Treatment
2. Industrial Cleaning and Metal Processing
Metal Degreasing and Oil Removal: Alkaline degreasing, stain removal, and oxide scale removal for steel/aluminum/zinc workpieces.
Phosphating/Rust Inhibitor: Phosphating treatment for steel surfaces, enhances coating adhesion, and provides short-term rust prevention.
Printing and Dyeing/Textile: Color fixing agent, mercerizing agent, anti-brittleness agent, and water softener.
Paper/Leather: Paper softener, pH buffer for adhesives; degreasing and degumming of raw hides in leather tanning.
Enamel/Ceramics: Flux, decolorizing agent, body strengthening agent.
3. Food Processing (Food Grade, compliant use)
Meat Products (Ham/Sausage/Luncheon Meat): Retains moisture, prevents juice loss, tenderizes texture, enhances viscosity, prevents slice breakage, extends shelf life; limit ≤3.0 g/kg.
Dairy Products/Beverages: Emulsifies and stabilizes cheese, prevents protein precipitation; stabilizes systems in condensed milk/dairy beverages, prevents separation; adjusts pH in fruit juice/carbonated beverages, prevents turbidity, prevents can wall rusting; limit ≤0.5 g/kg.
Baked Goods (Bread/Cakes): Adjusts dough acidity, promotes yeast fermentation, increases volume, improves softness, prevents discoloration and off-flavors.
4. Other Applications
Detergent Raw Materials: Strongly alkaline cleaning agents (car/floor/metal cleaners), for stain removal, emulsification, and softening.
Electroplating/Surface Treatment: Alkaline degreasing solutions, pre-plating degreasing, and corrosion prevention.
Pharmaceuticals/Daily Chemicals: pH buffers for pharmaceuticals, dental plaque removers, and bottle/jar detergents.
Lithium Battery Materials: Lithium iron phosphate (LFP) synthesis in an alkaline environment, promoting precipitation and increasing tap density.
Trisodium phosphate is a strongly alkaline, multifunctional phosphate. Industrially, it is primarily used for water softening, scale inhibition, degreasing, rust prevention, and cleaning; in food, it is responsible for water retention, stabilization, emulsification, and color protection, with numerous applications.
Post time: Apr-30-2026
