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EC number: 211-656-4
CAS number: 681-84-5
Water Solubility (tetramethyl orthosilicate): not relevantWater Solubility (silicic acid): very soluble, 1E+06 mg/l (QSAR)
The requirement to test the substance
for water solubility is waived on the basis that it hydrolyses very
rapidly to silicic acid and methanol. However, the water solubility of
the substance and its hydrolysis product have been predicted to be
8.8E+05 mg/l and 1.0E+06 mg/l (very soluble) at 20°C respectively. In
reality, however, the water solubility will be limited by the strong
tendency of Si(OH)4 to undergo condensation reactions of the type Si-OH
→ Si-O-Si; this can lead to formation of a highly cross-linked network
has a measured water solubility of 1E+06 mg/l at 20°C (OECD 2004a)
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