Sodium Silicate Properties and Uses
Time : 2024-04-03
Sodium silicate, also known as effervescent alkali, water glass, easily soluble in water and dilute lye, insoluble in alcohol and acid, aqueous solution is alkaline. It is easy to absorb moisture in the open air, with decontamination, emulsification, dispersion, wetting, permeability and PH buffer.


Sodium silicate is a non-toxic, odourless white powder or crystalline particles, soluble in water and insoluble in alcohol and acid. Sodium metasilicate is easily soluble in water and has the ability to decontaminate, emulsify, disperse, wet, penetrate and buffer PH value. Its strong alkalinity helps to remove acidic dirt and promotes saponification and emulsification of oils and fats. In particular, the buffering effect of sodium metasilicate is very strong, greatly superior to other alkaline additives.

Sodium metasilicate pentahydrate has the general characteristics of sodium silicate and sodium metasilicate, and has a certain calcium and magnesium ion binding capacity, especially for magnesium ions, the binding capacity is greater than 260mgMgCO2/g (35 ℃, 20min).

2.sodium silicate properties

Chemical formula for Na2SiO3, melting point 1088 ℃, density 2.4 g/cm. Sodium metasilicate is soluble in water, there are several hydrates.

Mix quartz and soda ash according to stoichiometry, co-melt at 1000-1350℃ to produce sodium metasilicate: the viscous aqueous solution of sodium metasilicate is called water glass, also known as effervescent soda ash, which can be used as antiseptic, detergent, adhesive, fireproofing and waterproofing agents.


It is used as casting, grinding wheel manufacturing and metal antiseptic in mechanical industry. It is used in the construction industry for manufacturing quick-drying cement, acid-resistant cement, refractory materials, etc.; in the textile industry for dyeing and bleaching of primary yarn; in the mining industry for ore dressing, waterproofing and plugging; in the paper industry for pulp binder, etc.

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