How much do you know about silicic acid? Introduction to the properties and uses of silicic acid

[Alias] metasilicic acid

［Molecular formula］H2SiO3

[Properties] White amorphous powder or transparent shiny glassy solid. Relative density 2.1-2.3. Very weak acidity. Easily soluble in hydrofluoric acid, soluble in sodium hydroxide or potassium hydroxide solution, insoluble in water or other inorganic acids. Reacts violently with hydrofluoric acid and decomposes. It decomposes into silica when heated to 150°C. Silicic acid can be obtained by adding any weak acid to soluble silicates. Free single molecule of silicic acid. It is soluble in water, but it gradually associates in the solution to form bi-molecules and tri-molecules, and finally forms an insoluble multi-molecular polymer, which is a colloidal solution called 'silicic acid sol'. For example, the concentration of silicate solution is relatively large. Silicic acid jelly is directly formed after adding acid, and silicic acid gel is obtained after dehydration. It has a high water content, is soft, transparent, and elastic.

[Quality Specifications]

Reference standards
IndicatorName		Indicator
First-class product	一level品
无码发thing,%	≤	0.20	0.40
Gasification (with Cl-吉),%	≤	0.005	0.005
Sulfate,%	0.005
Iron(with Fe plan), %	≤	0.005	0.005
Loss on ignition, %		20 -28	20-28

[Use] Used to manufacture catalysts, catalyst carriers, adsorbents silica gel, silicate and used as fluxes in tungsten wire processing and adsorbents for chromatographic separation. Also used for decolorizing grease, wax, etc.

[Brief preparation method] Silicic acid is prepared by soaking fine-pore spherical silica gel in hydrochloric acid for several hours, washing with deionized water, and drying.

[Safety and Protection] Packed in sealed and dry glass bottles, with a net weight of 500g per bottle. Store in a cool and dry place.

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Loss on ignition, %

20 -28

20-28

[Use] Used to manufacture catalysts, catalyst carriers, adsorbents silica gel, silicate and used as fluxes in tungsten wire processing and adsorbents for chromatographic separation. Also used for decolorizing grease, wax, etc.

[Brief preparation method] Silicic acid is prepared by soaking fine-pore spherical silica gel in hydrochloric acid for several hours, washing with deionized water, and drying.

[Safety and Protection] Packed in sealed and dry glass bottles, with a net weight of 500g per bottle. Store in a cool and dry place.