18649

二酸化ケイ素

acid washed

• 別名: クリストバライト, シリカ, 石英, 砂
• 化学式: SiO₂
• CAS番号: 60676-86-0
• 分子量: 60.08
• MDL番号: MFCD00011232
• UNSPSCコード: 12352303
• PubChem Substance ID: 57647755
• NACRES: SB.52

特性

• 形状: solid
• 品質水準: 100
• 品質: acid washed
• 不純物: ≤0.01% in acid soluble iron (Fe); ≤0.5% soluble in HCl
• 損失: ≤0.5% loss on ignition, 800 °C
• 屈折率: n20/D 1.544 (lit.)
• mp: 1610 °C (lit.)
• 密度: 2.6 g/mL at 25 °C (lit.)
• 微量陰イオン: chloride (Cl^-): ≤100 mg/kg
• SMILES記法: O=[Si]=O
• InChI: 1S/O2Si/c1-3-2
• InChI Key: VYPSYNLAJGMNEJ-UHFFFAOYSA-N

詳細

詳細

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.

アプリケーション

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.

安全性情報

• 保管分類コード: 11 - Combustible Solids
• WGK: nwg
• 引火点(°F): Not applicable
• 引火点(℃): Not applicable
• 個人用保護具 (PPE): Eyeshields, Gloves, type N95 (US)