Silica
ALDRICH/381276 - 99.8%
Synonym: Silica, fumed; Silica; Silicic anhydride; Silicon dioxide; Silicon dioxide amorphous
CAS Number: 112945-52-5
Empirical Formula (Hill Notation): SiO2
Molecular Weight: 60.08
MDL Number: MFCD00011232
Linear Formula: SiO2
Product Type: Chemical
| assay | 99.8% |
| form | powder |
| grade | standard |
| InChI | 1S/O2Si/c1-3-2 |
| InChI key | VYPSYNLAJGMNEJ-UHFFFAOYSA |
| matrix | Silica |
| matrix active group | silica |
| particle size | 0.011 μm |
| pore size | 60 Å mean pore size |
| separation technique | hydrophilic interaction (HILIC) |
| SMILES string | O=[Si]=O |
| surface area | 175-225 m2/g |
| technique(s) | LPLC: suitable |
| Application: | Silica was used in synthesis of silicalite. Silica was used to assist the catalytic growth of oxide and nitride nanowires. |
| Features and Benefits: | Has interesting thickening and thixotropic properties, and an enormous external surface area. |
| General description: | Silica is a naturally occurring material in minerals, flint and in some plants in crystalline phase. Silica commonly used in industries is in synthetic form. Surface area, pore volume, pore size and particle size are independently controllable to some extent. The crystalline silica may be classified based on atmospheric pressure as: a. Quartz: = 1143K b. Tridymite: 1143 - 1743K c. Cristobalite: = 1743, over 1973K it forms amorphous vitreous silica glass. |
| Other Notes: | May contain adsorbed H2O and CO2 which is removable by calcining at >900°C |
| Other Notes: | Particle sizes are for primary particles, which form branched, chain-like aggregates a few tenths of a micron long. |
| Packaging: | 100 g in poly bottle |
| Packaging: | 500 g in poly drum |
| RIDADR | NONH for all modes of transport |
| WGK Germany | WGK 2 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Purity | 99.8% |
| UNSPSC | 23201100 |