Sodium Metasilicate Pentahydrate
Sodium metasilicate pentahydrate
White powder; Relative density: 0.8-1.0; Melting point: 70-73℃; soluble in water or in thin alkali, insoluble in alcohol or in acid. The solution is alkaline, which presents detergency, emulsibility, dispersity, wettability, permeability and the buffer ability to the PH value, very hygroscopic and deliquescet when exposed to the air. Strong solution has a corroding effect on textile and skin.
Speciafication:
|
Item
|
Standard
|
|
NA2O %
|
28.7-30.0
|
|
SiO2 %
|
27.8-29.2
|
|
Fe(PPM)
|
100 max
|
|
Water insoluble %
|
0.05 max
|
|
Bulk Density(g/cm3)
|
0.80-0.97
|
|
Partical Size(16-30mesh) %
|
90 min
|
|
Whiteness %
|
80 min
|
|
PH of 0.1% Solution
|
12-13
|
|
Appearance
|
very small white granular
|
|
