31623

二氧化硅

washed and calcined, analytical reagent

• 别名: 白石英砂, 二氧化硅, 石英
• 线性分子式: SiO₂
• CAS号: 14808-60-7
• 分子量: 60.08
• EC 号: 238-878-4
• MDL编号: MFCD00011232
• UNSPSC代码: 12352300
• PubChem化学物质编号: 57648586
• NACRES: SB.52

属性

• 表单: granular
• 质量: washed and calcined, analytical reagent
• 杂质: ≤0.2% Soluble in HCl
• 缺失: ≤0.1% loss on ignition
• 造粒: 0.1-0.5 mm (min.70%)
• 痕量阴离子: chloride (Cl^-): ≤100 mg/kg
• SMILES字符串: O=[Si]=O
• InChI: 1S/O2Si/c1-3-2
• InChI key: VYPSYNLAJGMNEJ-UHFFFAOYSA-N

说明

一般描述

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.

应用

Silicon dioxide may be used to produce silicon by electrochemical reduction in the presence of calcium chloride (CaCl₂) electrolyte.

安全信息

• 储存分类代码: 13 - Non Combustible Solids
• WGK: nwg
• 闪点(°F): Not applicable
• 闪点(°C): Not applicable
• 个人防护装备: dust mask type N95 (US), Eyeshields, Gloves