What Is the Formula for Sodium Phosphate?

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NaH2PO4 is the chemical formula for sodium phosphate, which is also known as monobasic sodium phosphate and monosodium phosphate. It is a crystalline, water-soluble, white powder. It is used mainly in electroplating and dyeing.

Dibasic sodium phosphate, also called disodium phosphate, has a chemical formula of Na2HPO4. In its anhydrous form, it is white and crystalline. Disodium phosphate is commercially used in enamels, ceramic glazes, cheeses and baking powder. In its hydrated form, it appears as colorless crystals. This version is widely used in dye, pharmaceutical, detergent and fertilizer manufacture.

Tribasic sodium phosphate, referred to as trisodium phosphate or TSP, also appears as crystals in its hydrated form. It has the chemical formula Na3PO4, and it is used in detergent, paper, textiles and water-softening agents.