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Sodium Metasilicate Pentahydrate

  • CAS No.: 10213-79-3
  • Molecular weight: 212.14
  • Molecular formula: Na2SiO3 .5H2O
  • H.S.Code: 2839110000
  • DG class: 8.1 (corrosive)
  • UN No.: 3253
  • Sodium Metasilicate Pentahydrate
  • Specifications
  • MSDS
  • application
  • Inquiry
Appearance: white crystalline powder
Solubility: soluble in water, solubility is 50g in 100g water (20 ºC)
•  SMSP is strongly alkaline, having strong capacity of cleaning, buffering and softening, counteracting acidic contamination, emulsifying fat and oil, deflocculating to inorganic.
•  It can replace STPP to be used for the manufacture of effective detergents and rust remover for metal, reducing environmental pollution, preventing corrosion for metal (zinc, aluminum, etc.).
Technical Specifications:




White, uniform, beaded

Sodium oxide (Na2O) by wt %


Silica SiO2  by wt %


Fe by ppm

80 max

Water insoluble by wt%

0.06 max

Whiteness %

85 min

Bulk density by g/cm3


Particular size (14-40 mesh) by wt %

90 min

Main Application:
•  Detergents; Rust remover for metal; Grinding aids for ceramics; Deinking agent for paper; Dyeing and printing auxiliary for removing
oil in textile industry; Raw material for flameproofing agent; Plastic maintenance agent; Water retention agent; Water reducing agents.
Application in detergent industry:
•  With above features, SMSP is a good auxiliary for detergent system.
•  SMSP is also a good water softener, especially for Mg2+  ion, its exchange capacity of Mg2+  is 260mgMgCO3/g (35ºC, 20min).
Packing, Loading and Shelf life:



Shelf life 

25kg,1000kg PP bag with PE liner

27mts/20'fcl for 25kg bags, 25mts/20'fcl for 25kg on pallets, 20mts/20'fcl for 1000kg bags

24 months when stored in cool, dry and ventilated warehouse, away from incompatible materials +86 18238818989
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