Typical Property Data for
Sodium Metasilicate, pentahydrates
Sodium Metasilicate, pentahydrate is a free-flowing water-soluble beaded
powder form of metasilicate (silica (SiO2)-to-soda (Na2O) ratio of 1).

Sodium Metasilicates are manufactured from sodium silicate glass, which
is produced in furnaces by melting high purity sand with soda ash.
Sodium Metasilicate is mainly used for industrial
cleaning and detergent applications.

Sodium Metasilicate, pentahydrate is characterized by the property data shown
below. The properties and ranges shown are typical values, not manufacturing specifications. Physical properties are measured at 20o
C (68o

Typical Property Data METSO PENTABEAD® 20 
Sodium Metasilicate Pentahydrate
Wt % Na2O (±1.0)  29.3
Wt % SiO2 (±1.4)  28.4
Wt% H2O (±0.5)   41.75
Density, lb/ft3 (g/cm3)  55 (0.88)
Particle Size, Tyler  94% in 16 to 48 mesh
Melting Point, oF (
oC)  162 (72)
Rate of Solution in Water, sec 35
(5wt%, 70oF)
Appearance of Solution Clear 

Sodium metasilicates, METSO BEADS® 2048 and METSO PENTABEAD®20, offer the convenience of sodium silicate and sodium hydroxide (caustic soda) in an easy to handle, free-flowing bead. Available in both anhydrous and pentahydrate, sodium metasilicates are the workhorse ingredients in detergents and cleaning products. The metal cleaning, industrial and institutional cleaners, textile and food processing industries all utilize metasilicates for the superior physical and chemical properties. They are also used to manufacture specialty cements used in the drilling industry.