Agent Name

Disodium phosphate

Alternative Name

Sodium phosphate, dibasic

CAS Number

7558-79-4

Formula

H-O4-P.2Na

Major Category

Metals

Synonyms

Sodium phosphate, dibasic; Acetest; DSP; Dibasic sodium phosphate; Disodium acid orthophosphate; Disodium acid phosphate; Disodium hydrogen phosphate; Disodium hydrogen phosphate, anhydrous; Disodium hydrophosphate; Disodium monohydrogen phosphate; Disodium orthophosphate; Disodium phosphate, anhydrous; Disodium phosphoric acid; Exsiccated sodium phosphate; Fleet enema; Natriumphosphat [German]; Phosphate of soda; Phosphoric acid, disodium salt; Soda phosphate; Sodium acid phosphate, anhydrous; Sodium hydrogen phosphate; Sodium monohydrogen phosphate; Sodium monohydrogen phosphate (2:1:1); Sodium orthophosphate, secondary; Sodium phosphate; Sodium phosphate (NaH2PO4); Sodium phosphate, dibasic (anhydrous); Sodium phosphate, exsiccated; secondary Sodium phosphate; [ChemIDplus]

Category

Phosphates, Metallic Salts

Description

Colorless or white hygroscopic solid; [Hawley] White powder; [MSDSonline]

Sources/Uses

Used as emulsifier and buffer in foods and pharmaceuticals, metal phosphatising/electroplating reagent, scale inhibitor (boiling water treatment), textile/leather auxiliary, sequestrant, mordant in dyeing, fireproofing agent, reagent and buffer in analytical chemistry, cathartic, and veterinary laxative; Also used for weighting silk and in pottery glazes/porcelain/enamels, tanning, and soldering/brazing (instead of borax); [HSDB] Used in fertilizers, galvanoplastics, and as a dietary supplement; [Hawley]

Comments

A mild skin, eye, and respiratory tract irritant; [ICSC] Emergency treatment: "Inorganic phosphates"; Inorganic phosphates can cause diarrhea, hyperphosphatemia, and hypocalcemia after ingestion; An adult died after receiving four sodium phosphate enemas within 24 hours; he had electrolyte abnormalities and died from cardiac arrest; [HSDB] A mild eye irritant in rabbits; [RTECS]

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