Sodium metasilicate pentahydrate
silicate
Na₂SiO₃·5H₂O
Manufacturer data
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What one dose does
PARAMETER
1 g / 100 L
Alkalinity
+0.2643 dKH
Silicate
+2.8323 ppm SiO₂
To raise alkalinity by 1 dKH in 100 L: 3.8 g.
How it’s used
Silicate for sponges and diatoms. Very alkaline: dissolve in RO water and dose small amounts.
Cautions
• Strong base: wear gloves and eye protection.
• Also adds alkalinity (about 0.26 dKH per gram in 100 L).
pH effect: raises.
Sources
Molar mass 212.14 g/mol.
stoichiometry (IUPAC atomic weights)