Specification of Sodium Meta Silicate –Pentahydrate
CAS NO. : 10213-79-3 (Pentahydrate),
EINECS NO. : 229-912-9
Formula : SiO3Na2•5H2O
Mol Wt. : 212.74
H.S.Code : 2839.19
Synonyms : Metso Beads, Silicic acid, disodium salt; Sodium-m-
Silicate; Orthosil; Disodium metasilicate; Disodium
Monosilicate; Waterglass; Disodium trioxosilicate;
Physical And Chemical Properties :
Physical State : White granule
Solubility In Water : Soluble in cold water. Hydrolyzes in hot water
pH : 12.3 – 12.5 (1% Solution)
Flash Point : Not considered to be a fire hazard
Stability : Stable under ordinary conditions
Appearance : white granules
SiO2 : 28.5 ± 1.0%
Na2O : 28.5 ± 1.0%
H2O : 45.5 ± 1.0%
Fe : 100ppm max
