What is Solid Sodium Silicate?

Solid sodium silicate, also known as solid water glass, is an inorganic silicate compound with the chemical general formula Na₂O·nSiO₂.

It is produced by melting quartz sand (SiO₂) and soda ash (Na₂CO₃) at high temperature, then cooling and crushing into solid lumps, flakes or granules.

Sanlee Chemical as a professional sodium silicate manufacturer and reliable sodium silicate solid supplier, we provide high-purity industrial sodium silicate with stable performance, especially the customized solid sodium silicate modulus 3.1-3.3 that meets diverse industrial production needs.

The appearance of solid sodium silicate is transparent/translucent glassy solid, colorless, light gray or pale green; hard and brittle. It is not soluble in cold water, but slowly dissolves/hydrolyzes in hot water to form liquid sodium silicate solution (liquid water glass) 

Introduction to Sodium Silicate Solid

Solid sodium silicate, widely known as solid water glass, is a versatile inorganic silicate compound with the general chemical formula Na₂O·nSiO₂.

It is industrially manufactured by fusing high-purity quartz sand and soda ash at extreme temperatures ranging from 1200℃ to 1400℃, followed by rapid cooling and crushing into hard, brittle, glassy solid lumps or flakes. This anhydrous solid product features adjustable modulus, referring to the variable ratio of silicon dioxide to sodium oxide, which directly dictates its physical and chemical performances for diverse industrial scenarios.

Visually, it appears colorless, translucent or pale gray with stable solid-state properties, boasting longer shelf life and higher concentration compared to liquid sodium silicate. It is insoluble in cold water, ethanol and acidic solutions, but can gradually dissolve and hydrolyze in hot water to form homogeneous alkaline silicate solutions.

Possessing excellent adhesion, heat resistance, acid resistance and fire-retardant properties, solid sodium silicate serves as a fundamental industrial chemical.

It is extensively applied as a high-strength binder for foundry sand molds and refractory materials, a sealing and waterproof agent for concrete construction, and a key raw material for producing liquid water glass, ceramic glazes and industrial detergents. Its stable performance and cost-effectiveness make it an indispensable material in construction, metallurgy, chemical and environmental protection industries.

CAS Number

CAS No.: 1344-09-8

Chemical Formula

General chemical formula: Na₂O·nSiO₂; The specific formula of our solid sodium silicate modulus 3.1-3.3 is matched according to the precise molar ratio of silica and sodium oxide, with stable molecular structure and consistent product batch performance.