Sodium Metasilicate Pentahydrate (Metso)

Sodium Metasilicate Pentahydrate (Metso)

A major use is as a builder (a material that enhances or maintains the cleaning efficiency of the surfactant, principally by inactivating water hardness) in soaps and detergents. Mainly used in making high efficiency detergents and metal cleaners. As a substitute for STPP, it can increase cleaning efficiency and reduce environment pollution, it provides excellent alkaline buffering, corrosion prevention for metal (i.e. Zinc, Aluminum), and aids in the of softening water. Used to improve washing detergents and metal cleaners.

It is also used extensively as an anti-corrosion agent in boiler-water feed.

Sodium metasilicate is used in fireproofing mixtures; in laundry, dairy, metal, and floor cleaning; in deinking paper; in washing carbonated drink bottles; in insecticides, fungicides, and antimicrobial compounds; as a chemical intermediate for silica gel catalysts; as an ingredient in adhesives; as a bleaching aid to stabilize hydrogen peroxide; as a clay deflocculant in the ceramics industry, and as a boiler compound. Combined with other salts such as sodium bicarbonate, it can be applied to aluminum as a paint stripper.

SPECIFICATIONS:

Formula: NaSiO
Molar mass: 122,06 g/mol
Melting point: 1 088 °C
Density: 2,4 g/cm³
Soluble in: Water

Appearance: Colorless or white crystal
CAS no: 6834-92-0

It is considered to be safer to use than sodium hydroxide (caustic soda) and does not attack metals including aluminium as aggressively as caustic. It moderates the tendency of the alkali to corrode and dissolve metals. Sodium silicate reacts with metal oxides to form a protective film on metal surfaces. This film is maintained as long as small amounts of soluble silica remain in the presence of water.