Magnesium phosphate hydrate

CAS Number
53408-95-0
EC Number
684-534-5

What is Magnesium phosphate hydrate?

Magnesium phosphate hydrate (CAS 53408-95-0) is an inorganic mineral salt combining magnesium and phosphate in a hydrated form.

Where is Magnesium phosphate hydrate used?

  • Food and nutraceutical manufacturing: mineral fortification agent and buffering component in dry blends, tablets and functional food formulations
  • Pharmaceutical production: excipient in tablet and capsule production where controlled pH and mineral content are critical to formulation stability
  • Agriculture and animal feed: bioavailable magnesium and phosphorus for soil amendment programs and feed mineral premixes
  • Water treatment: pH correction and scale control in process water systems
  • It functions as a pH buffer, mineral supplement source and preservation aid.
  • Magnesium phosphate tribasic acts as a stable, non-bitter supplement of phosphorus and magnesium in the food sector.

Good to know: Food-grade and pharmaceutical-grade specifications are available to meet FCC and USP compliance requirements where purity documentation is required; technical-grade material is offered for agricultural and industrial water treatment applications where tighter purity thresholds are not mandated.

Typical specification

  • Loss on ignition: 32.0% or less at 425°C.

Regulatory status

  • Magnesium phosphates have been reviewed by EU SANCO.

Storage, packaging and handling

  • Assay by titration with excess HCl: 98.0 to 102.0% on ignited basis.
  • Purity of 98% or higher on an ignited basis is available on the market.
  • Should be stored at room temperature.

Technical content is compiled and updated by the SoleChem product team from public technical sources; the certificate of analysis (COA) governs product-specific specifications.

Other Names (Synonyms)

RefChem:1088730|trimagnesium;diphosphate;hydrate|Magnesiumphosphate xhydrate|H2Mg3O9P2|Phosphoric acid, magnesium salt (2:3), hydrate|Magnesium phosphate (Mg3(PO4)2) hydrate|Magnesium Phosphate

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What are the physical properties of Magnesium phosphate hydrate?

Melting Point >300°C
Density 2.195 g/mL at 25 °C(lit.)
Appearance White powder
Color White
Form Powder
Log P -2.148 (est)

Which trade and regulatory codes apply to Magnesium phosphate hydrate?

HS Code 28352990
Storage Class 11 - Combustible Solids
WGK (Germany) 3
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