18649

Silicon dioxide

acid washed

• Sinónimos: Cristobalite, Quartz, Sand, Silica
• Fórmula lineal: SiO₂
• Número de CAS: 60676-86-0
• Peso molecular: 60.08
• Número MDL: MFCD00011232
• Código UNSPSC: 12352303
• ID de la sustancia en PubChem: 57647755
• NACRES: SB.52

Propiedades

• formulario: solid
• Nivel de calidad: 100
• calidad: acid washed
• impurezas: ≤0.01% in acid soluble iron (Fe); ≤0.5% soluble in HCl
• pérdida: ≤0.5% loss on ignition, 800 °C
• índice de refracción: n20/D 1.544 (lit.)
• mp: 1610 °C (lit.)
• densidad: 2.6 g/mL at 25 °C (lit.)
• trazas de anión: chloride (Cl^-): ≤100 mg/kg
• cadena SMILES: O=[Si]=O
• InChI: 1S/O2Si/c1-3-2
• Clave InChI: VYPSYNLAJGMNEJ-UHFFFAOYSA-N

Descripción

Descripción general

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)triethoxysilane (APTES) for binding lactate dehydrogenase (LDH) to form an amino layer has been reported. The silicon-silicon dioxide structure has been investigated at liquid nitrogen temperature by electron spin resonance spectra.

Aplicación

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.

Información de seguridad

• Código de clase de almacenamiento: 11 - Combustible Solids
• Clase de riesgo para el agua (WGK): nwg
• Punto de inflamabilidad (°F): Not applicable
• Punto de inflamabilidad (°C): Not applicable
• Equipo de protección personal: Eyeshields, Gloves, type N95 (US)