SILICIC ACID CAS#1343-98-2
Stable Chemical PropertiesL: Exhibits excellent chemical stability with resistance to hydrochloric acid and sulfuric acid, making it suitable for various chemical applications.
High Purity and Unique Physical Characteristics: Appears as a white amorphous powder with consistent composition and reliable performance, suitable for specialized industrial uses.
Versatile Solubility and Reactivity: Can react with alkaline solutions to form valuable silicate compounds, such as potassium silicate and sodium silicate, expanding its application potential.
Wide Application Flexibility: Available in different forms, including sol, precipitate, and gel, depending on preparation conditions, allowing adaptation to diverse processing requirements.
SILICIC ACID CAS#1343-98-2
Silicic acid, also known as metasilicic acid, is a dibasic weak acid that is nearly insoluble in water. It has the chemical formula H₂SiO₃ and a molecular weight of 78.10. The compound appears as a white amorphous powder with low water solubility. Its first ionization equilibrium constant is K₁ = 2 × 10¹⁰ at room temperature.
In nature, silicic acid is commonly found in the form of salts. It is insoluble in hydrochloric acid and sulfuric acid, but can dissolve in hydrofluoric acid and alkaline solutions such as potassium hydroxide and sodium hydroxide, producing potassium silicate (K₂SiO₃) or sodium silicate (Na₂SiO₃) along with water.
Silicic acid has a decomposition melting point of approximately 150℃. When heated above this temperature, it decomposes into silicon dioxide and water, with silicon dioxide serving as silicic anhydride. Silicic acid cannot be directly synthesized by the reaction of silicon dioxide with water; instead, it is obtained through the reaction of silicates with acids. Depending on the solution concentration, the resulting silicic acid may appear as a white sol or form a gel precipitate.
SILICIC ACID Chemical Properties
| density | 0.230 g/cm3 |
| storage temp. | Store at room temperature, keep dry and cool |
| form | powder |
| color | White |
| Odor | Odorless |
| Water Solubility | Soluble in water. |
| Merck | 138564 |
| Dielectric constant | 2.0（Ambient） |
| Stability: | Stable. |
| Cosmetics Ingredients Functions | ANTICAKING |
| VISCOSITY CONTROLLING | |
| OPACIFYING | |
| ABRASIVE | |
| BULKING | |
| ABSORBENT | |
| InChI | InChI=1S/H2O3Si/c1-4(2)3/h1-2H |
| InChIKey | IJKVHSBPTUYDLN-UHFFFAOYSA-N |
| SMILES | [Si](O)(O)=O |
| CAS DataBase Reference | 1343-98-2(CAS DataBase Reference) |
| EPA Substance Registry System | Silicic acid (1343-98-2) |
| Hazard Codes | Xi |
| Risk Statements | 36/37 |
| Safety Statements | 22-26-36-24/25 |
| WGK Germany | 3 |
| RTECS | VV8853000 |
| TSCA | Yes |
Product Application of Silicic Acid CAS#1343-98-2
Silicic acid hydrate is widely used in scientific research related to neurodegenerative diseases due to its ability to reduce aluminum absorption. It is also applied in the production of catalysts and catalyst carriers, serving as an important functional material in industrial processes. In addition, silicic acid hydrate is used as a chemical reagent and flux in tungsten filament manufacturing, as well as for the decolorization treatment of oils and waxes.
