Silicon dioxide
SUPELCO/18649 - acid washed
Synonym: Cristobalite; Quartz; Sand; Silica
CAS Number: 60676-86-0
Empirical Formula (Hill Notation): O2Si
Molecular Weight: 60.08
MDL Number: MFCD00011232
Linear Formula: SiO2
Product Type: Chemical
| anion traces | chloride (Cl-): ≤100 mg/kg |
| density | 2.6 g/mL at 25 °C (lit.) |
| form | solid |
| impurities | ≤0.01% in acid soluble iron (Fe) |
| ≤0.5% soluble in HCl | |
| InChI | 1S/O2Si/c1-3-2 |
| InChI key | VYPSYNLAJGMNEJ-UHFFFAOYSA |
| loss | ≤0.5% loss on ignition, 800 °C |
| mp | 1610 °C (lit.) |
| quality | acid washed |
| Quality Level | 100  |
| refractive index | n |
| SMILES string | O=[Si]=O |
| Application: | Silicon dioxide may be used to produce silicon by electrochemical reduction in the presence of calcium chloride (CaCl2) electrolyte. It may also be used to prepare FeCl3/SiO2, a supported reagent for the oxidative coupling reactions. |
| General description: | Silicon dioxide (SiO2) exists in three crystalline forms, namely quartz, tridymite and cristobalite. It reacts with hydrofluoric acid to form silicon tetrafluoride (SiF4) and water. Silicates are formed on reacting SiO2 with alkali melts. SiO2 is the main component in glass, brick and concrete and also forms the insulator in silicon devices. The alteration of the surface of SiO2 with (3-aminopropyl)triethoxys |
| RIDADR | NONH for all modes of transport |
| WGK Germany | nwg |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| mp | 1610 °C (lit.) |
| Density | 2.6 g/mL at 25 °C (lit.) |
| Refractive Index | n |
| UNSPSC | 12352300 |