Agent Name

Sodium metaphosphate

Alternative Name

Maddrell's salt

CAS Number

10361-03-2

Formula

H-O3-P.Na

Major Category

Metals

Synonyms

Insoluble metaphosphate; Insoluble sodium metaphosphate; Sodium metaphosphate, insoluble; Graham's salt; Kurrol's salt; Maddrell's salt; Metafos; Metaphosphoric acid (HPO3), sodium salt; Metaphosphoric acid (HPO3), sodium salt, homopolymer; Poly(sodium metaphosphate); Polymeric sodium metaphosphate; Sodium Kurrol's salt; Sodium phosphate (NaPO3); Sporix; [ChemIDplus] Maddrells salt; Polymeric sodium metaphosphate; [Merck Index]

Category

Phosphates, Metallic Salts

Description

White solid, practically insoluble in water; [Merck Index]

Sources/Uses

Used in toothpaste and dentifrices (abrasive), detergents, water softeners, food additives (sequestrant and emulsifier), and textile processing; [HSDB]

Comments

It changes to sodium trimetaphosphate above 505 deg C and to sodium hexametaphosphate above 607 deg C; [Merck Index] Intraperitoneal LD50 (mouse) = 830 mg/kg; Acute tubular necrosis is adverse effect in IP lethal dose studies; [ChemIDplus] See "Sodium tetrametaphosphate."

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