General Information:

Chemical name: Sodium silicate

CAS No.: 1344-09-8

Molecular formula: Na2SiO3

Standard executed: GB/T 4209-2008

Packaging: in 25KG/1250KG PP woven bag with PE liner

 

Technical specification

Items 

Standards: Low-mod

Standards: High-mod

Purity (Na2SiO3) %

≥99.0

≥99.0

Modulus

2.0-2.2

3.0-3.5

Na2O content, %

30.5-33.0

22.2-24.5

SiO2O content, %

66.50-68.0

75.50-77.7

Ferric (Fe) content, %

≤0.03

≤0.03

Aluminum (Al) content %

≤0.02

≤0.02

Water Solubility

22.2 g/100ml (25℃); 160.6 g/100ml (80℃)

22.2 g/100ml (25℃); 160.6 g/100ml (80℃)

Melting point

1089 °C

1089 °C

Boiling point

Boiling point in standard state (at 25 ℃[77 °F], 100 kPa) - decomposes

Boiling point in standard state (at 25 ℃[77 °F], 100 kPa) - decomposes

Density

2.4 g/cm3

2.4 g/cm3

 

 

 

Sensitivity

Hygroscopic

Hygroscopic

Stability

Stable

Stable

Storage

Closed containers at temperature lower than 60°C (140°F, 333.15°K)

Closed containers at temperature lower than 60°C (140°F, 333.15°K)

Shelf life/Retest

24 months

24 months

 Appearance
White to greenish opaque crystals
White to greenish opaque crystals

 

 

Description

The formulations of Sodium Silicate vary, depending on the amounts of Na2O and SiO2. Also, replacing the sodium by another alkali metal, such as potassium or lithium, results in other kinds of silicate glasses. Some compounds are better suited than others for particular applications, but they all share the same essential properties. 

 

Water glass can be used to make silica gel beads or packets used to protect clothing and electronics from moisture. It’s also effective in passive fire protection, making of cement, stabilizing boreholes when drilling wells, in the cardboard manufacturing, as a flocculant in wastewater treatment. Additional applications are in food preservation, in the processing of lumber and textiles, and for automotive repair.

 

A water glass solution can seal the pores of the eggs to protect them against bacteria and gases when refrigeration isn’t an option. Fresh eggs stored under cool conditions in a viscous silicate solution remain preserved for months. Liquid glass can also harden the artificial stone, as it’s a naturally occurring chemical in some mineral baths.

 

Dissolved water glass is moderate to highly alkaline. In detergents, this property supports the removal of fats and oils, the neutralization of acids, as well as the division of starches and proteins. The same property makes the compound useful in the bleaching of paper pulp and the deinking of waste paper.

 

Small quantities of dissolved water glass can be useful in the treatment of municipal water supplies as well as wastewater. It aids in the formation of loose agglomerations of particles (flocs) through adsorption of metallic ions. That process filters the water from undesirable suspended materials.

 

Under acidic conditions, liquid Sodium Silicate reacts to form a hard, glassy gel. This property makes it valuable as a bonding agent in cemented products such as concrete and abrasive wheels. It is also an excellent adhesive for porcelain and glass.

 

 

Stability/Shelf life

Stable. Incompatible with acids, most metals, many organic materials.

 

Recommended storage conditions: Solid sodium silicate can be stored in closed containers. Silicate solutions should be stored at temperature lower than 60℃.

 

Manufacturing

The general formula of sodium silicate (liquid silicate, Metso, or sodium silicate beads) is Na2SiO3. The most common formulas of Water Glass are

Na2(SiO2)nO

K2(SiO2)nO

 

 

Alkali and quartz sand are reacted in either the solid or liquid phase to produce a glassy solid with the beneficial property of being soluble in water (water glass). Common alkaline material used in the process is sodium carbonate or caustic soda. Sodium silicate liquid can also be created directly by dissolving silica sand under pressure in a heated aqueous solution of caustic soda. The higher the concentration of ingredients gives the more viscous solution.

 

Industry use

Water glass is used as a convenient source of sodium for various industrial products. It’s a builder in laundry detergents, soaps, adhesives, as a binder, and a flocculant in water-treatment plants, along with many other applications. It is used in water treatment, and in making drilling fluids and bleaches.

 

Consumer use

Sodium silicate can be used as a preservative for eggs. It’s ideal for use in some of the most common consumer products, like powdered laundry and dishwasher detergents.

 

Solubility

Water Glass is one of the few silicon syntheses that dissolve in water. It’s insoluble in alcohol.

 

Common synonyms

Sodium Metasilicate

Waterglass

Sodium Siliconate

 

FAQ

Q1: Do you supply Sodium silicate solution, 32%/50%?

A: STPP Group does supply Sodium silicate solution 32% for China market. But due to transportation inconvenience, we do not supply Sodium silicate solution internationally, only Sodium silicate lumps are available.

 

Q2: What type of Sodium silicate do I use to produce synthetic detergent powder? Low-mod or high-mod?

A: Low-mod Sodium silicate is used for synthetic detergent powder.

 

Q2: What is your minimum order quantity (MOQ)?

A: Our MOQ for Sodium silicate is 26 tons in 1*20”GP.