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Table of physical and chemical properties of precipitated silica

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Scientific name precipitated hydrated silica
Molecular formula SiO2 * nH2O
Main ingredients SiO2
Original particle size 0.3 μm or less
Relative density 2.319 ~ 2.653
Melting point 1750 ℃
Appearance white amorphous powder
Solubility Insoluble in water and acids; soluble in caustic soda and hydrofluoric acid


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