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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

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Specifications
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Appearance: white crystalline powder

Solubility: soluble in water, solubility is 50g in 100g water (20 ºC)

Properties:

• 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:

Index	Standard
Appearance	White, uniform, beaded
Sodium oxide (Na2O) by wt %	28.50~30.00
Silica SiO2 by wt %	27.30~29.00
Fe by ppm	80 max
Water insoluble by wt%	0.06 max
Whiteness %	85 min
Bulk density by g/cm3	0.85-0.95
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:

Packing

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

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