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7758-11-4
bosschem
7758-11-4
Potassium phosphate dibasic (also known as dipotassium phosphate) is a highly water-soluble inorganic salt with the formula K₂HPO₄. It is widely used as a buffering agent in biology and biochemistry, a food additive (E340), an electrolyte replenisher, and a source of potassium and phosphorus in fertilizers.
name of index | % | technical grade | Food-grade |
Main content (calculated as K₂HPO₄·3H₂O) | ≥ | 97.0 | 98.0 |
Phosphorus pentoxide (P₂O₅) | ≥ | 30.2 | 30.5 |
Potassium oxide (expressed as K2O) | ≥ | 40.0 | 40.4 |
pH value (1% aqueous solution) | 8.0-9.0 | 8.0-9.0 | |
water-insoluble | ≤ | 0.1 | 0.1 |
Fluoride (expressed as F) | ≤ | -- | 0.003 |
arsenic （As） | ≤ | -- | 0.0003 |
Heavy metals (expressed as Pb) | ≤ | -- | 0.001 |
Food Grade: Acidity Regulators (Buffers), Emulsifiers and Thickeners, Stabilizers, and Dietary Enhancers
1. "Anti-acid Coagulant" for Non-dairy Creamer and Coffee Creamer: Adding anhydrous dipotassium hydrogen phosphate to coffee creamer (non-dairy creamer), milk tea powder, and instant solid beverages perfectly buffers the acidity of coffee, locks in proteins, and ensures uniform dissolution, resulting in a smooth and delicate texture. The anhydrous nature prevents the creamer powder from absorbing moisture and clumping inside the packaging.
2. Stabilizer for High-Grade Dairy Products and Condensed Milk: Used in evaporated milk, condensed milk, and dairy beverages to prevent milk proteins from coagulating, separating, or floating during high-temperature sterilization or long shelf life.
3. Low-Sodium Meat Products and Baked Goods: In health foods promoting "reduced salt and low sodium" (such as low-sodium ham, sausages, and processed cheeses), it replaces traditional sodium salts as a water-retaining agent and emulsifying salt; in baking, it acts as a dough conditioner and alkaline buffer.
Industrial Grade:
1. Water Treatment Scale and Corrosion Inhibitor: Used as a buffer and corrosion inhibitor in chilled brine and circulating cooling water systems. It induces a dense phosphate protective film on the surface of metal pipes, isolating dissolved oxygen and preventing chemical pitting.
2. Antifreeze Corrosion and Rust Inhibitor: Widely added to automotive engine glycol antifreeze. Because antifreeze slowly oxidizes and produces acid that corrodes the water tank during long-term operation at high temperatures, adding anhydrous dipotassium hydroxide as a pH buffer neutralizes acidic substances and protects automotive metal parts such as aluminum, copper, and iron from corrosion.
3. Pulp Bleaching and Specialty Ceramics: Used as a slip agent and buffer in the paper industry for printing, dyeing, and bleaching; and as a flux in specialty ceramics and bone china.
20kg or 25kg paper-plastic composite bags, 25kg plastic woven bags
