Trisodium phosphate

Trisodium phosphate (Na₃PO₄) is an inorganic salt composed of sodium ions and phosphate ions. Its alkalinity makes it useful in cleaning, food processing, and industrial applications.

Phosphate: Phosphate is a phosphorus–oxygen anion or functional group, commonly derived from phosphoric acid. The PO₄³⁻ ion is the anionic component of trisodium phosphate.
Cleaning agent: A cleaning agent is a substance used to remove dirt, grease, stains, or contaminants. Trisodium phosphate is an alkaline builder in some heavy-duty cleaning products.
Disodium phosphate: Disodium phosphate is a sodium phosphate salt with formula Na₂HPO₄. It has one fewer sodium ion and a different acid–base balance than trisodium phosphate.
Eutrophication: Eutrophication is nutrient enrichment of water that can drive excessive algal and plant growth. Phosphate released from detergents can contribute to nutrient loading in lakes and rivers.
Acid–base reaction: An acid–base reaction involves proton transfer between chemical species. Phosphate ions accept protons, helping trisodium phosphate neutralize acidic substances.
Detergent builder: A detergent builder improves cleaning by controlling water hardness, alkalinity, or soil dispersion. Phosphate can bind calcium and magnesium ions that otherwise interfere with detergents.
Monosodium phosphate: Monosodium phosphate is a sodium phosphate salt with formula NaH₂PO₄. Its more protonated phosphate ion makes it less alkaline than trisodium phosphate.
Algal bloom: An algal bloom is a rapid increase in algae or cyanobacteria in aquatic waters. Excess phosphorus from wastewater can help fuel blooms, especially in phosphorus-limited waters.
Alkalinity: Alkalinity is a solution’s capacity to neutralize added acid. Dissolved trisodium phosphate produces alkaline solutions that aid soil removal.
Food additive: A food additive is a substance intentionally used to affect food properties or processing. Food-grade trisodium phosphate is used for technical effects in some processed foods.

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