Silicon dioxide
ALDRICH/634867 - single crystal substrate, optical grade, 99.99% trace metals basis, L × W × thickness 10 mm × 10 mm × 0.5 mm
Synonym: Cristobalite; Quartz; Sand; Silica
CAS Number: 60676-86-0
Empirical Formula (Hill Notation): O2Si
Molecular Weight: 60.08
EC Number: 262-373-8
MDL Number: MFCD00011232
Linear Formula: SiO2
Product Type: Chemical
| assay | 99.99% trace metals basis |
| density | 2.6 g/mL at 25 °C (lit.) |
| 2.684 g/mL | |
| form | solid |
| grade | optical grade |
| hardness | 7.0 mohs |
| InChI | 1S/O2Si/c1-3-2 |
| InChI key | VYPSYNLAJGMNEJ-UHFFFAOYSA |
| L × W × thickness | 10 mm × 10 mm × 0.5 mm |
| mp | 1610 °C (lit.) |
| refractive index | n |
| SMILES string | O=[Si]=O |
| transition temp | Tm 573.1 °C (phase change) |
| Application: | SiO2 is majorly used as a substrate material with excellent thermo-mechanical properties in a variety of applications which include: • vapour deposition • phase deposition • atomic force microscopy probes(AFM) • spin coating • electronic based devices |
| Features and Benefits: | An excellent substrate for microwave filters for applications in the wireless communication arena. |
| Other Notes: | specific heat = 0.18 cal/g; thermoelectric constant = 1200μV/°C @ 300 °C; thermal conductivity = 0.0033 cal/cm°C; themal expansion (x10-6) = α11: 13.71, α33: 7.48; Q value = 1.8 × 106 min; acoustic velocity, SAW = 3160 m/sec; frequency constant, BAW = 1661 kHz/mm; piezoelectric coupling = K2 BAW: 0.65%, SAW: 0.14% |
| Packaging: | 5 ea in padded box |
| Physical form: | Crystalline, hexagonal (a = 4.914 Å, c = 5.405 Å) |
| Symbol |   GHS07,GHS08 |
| Signal word | Warning |
| Hazard statements | H319 - H335 - H373 |
| Precautionary statements | P305 + P351 + P338 - P314 |
| Hazard Codes | Xn |
| Risk Statements | 36/37-48/20 |
| Safety Statements | 22-26-36 |
| RIDADR | NONH for all modes of transport |
| WGK Germany | nwg |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Purity | 99.99% trace metals basis |
| mp | 1610 °C (lit.) |
| Density | 2.6 g/mL at 25 °C (lit.); 2.684 g/mL |
| Refractive Index | n |
| UNSPSC | 12352303 |