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

• フォーム: 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.[1] SiO₂ is the main component in glass, brick and concrete and also forms the insulator in silicon devices.[2] 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.[3] The silicon-silicon dioxide structure has been investigated at liquid nitrogen temperature by electron spin resonance spectra.[4]

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.[5] It may also be used to prepare FeCl₃/SiO₂, a supported reagent for the oxidative coupling reactions.[6]

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)