Agent Name

Sodium phosphate, monobasic

CAS Number

7558-80-7

Formula

H3-O4-P.Na

Major Category

Metals

Synonyms

Sodium phosphate monobasic anhydrous; Acid sodium phosphate; MSP; Monobasic sodium phosphate; Monosodium dihydrogen orthophosphate; Monosodium dihydrogen phosphate; Monosodium hydrogen phosphate; Monosodium monophosphate; Monosodium orthophosphate; Monosodium phosphate; Monosodium phosphate, anhydrous; Monosorb XP-4; Phosphoric acid, monosodium salt; Primary sodium phosphate; Sodium acid phosphate; Sodium biphosphate anhydrous; Sodium dihydrogen monophosphate; Sodium dihydrogen orthophosphate; Sodium dihydrogen phosphate; Sodium dihydrogen phosphate (1:2:1); Sodium dihydrogen phosphate (NaH2PO4); Sodium dihydrogen phosphate, anhydrous; Sodium monobasic phosphate (NaH2PO4); Sodium orthophosphate, primary; Sodium phosphate (Na(H2PO4)); Sodium phosphate (NaH2PO4); Sodium primary phosphate; [ChemIDplus]

Category

Phosphates, Metallic Salts

Description

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

Sources/Uses

Used as a pH buffer (baking powders, fleet enema solutions, electroplating baths, and acid cleaners), sequestrant for foods, emulsifier, laboratory reagent, metal phosphatising reagent, and textile dyeing/printing auxiliary; Also used to treat boiler water and wastewater, remove halogen from waste gases, supplement animal feed, and acidify urine; [HSDB]

Comments

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 and humans; [RTECS]

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