Anhydrous sodium metasilicate (Sodium metasilicate anhydrous) is an important inorganic compound with the chemical formula Na₂SiO₃, molecular weight 122.06, and CAS number 6834-92-0.
Appearance:‌ White powder or granules;
Synonym:Disodium metasilicate
‌Melting point:‌ 1089°C;
‌Density:‌ 2.4 g/cm³;
‌Refractive index:‌ 1.520 (in glassy state)
‌Solubility‌: Readily soluble in cold water; hydrolyzes in hot water
‌pH value‌: The aqueous solution is strongly alkaline (pH=11 at 1 mM concentration, pH=12.62 at 100 mM concentration)
‌Primary Applications of Sodium Metasilicate (Anhydrous), Zero-Water Sodium Silicate:
1.Industrial Cleaning and Detergents
‌As a substitute for sodium tripolyphosphate (STPP), it is used in high-efficiency detergents and metal cleaning agents, offering strong stain-removing capabilities and excellent emulsification of grease and oils.
It is used as a dispersant and buffer in industries such as ceramics, electroplating, textiles, and printing and dyeing.
2.Building Materials
As a cement and concrete additive, enhancing compressive strength and acid resistance
3.Other domains
In the industrial fields of ‌papermaking (as a binder), petroleum (as a drilling mud stabilizer), and leather processing‌.