18649

Silicon dioxide

acid washed

• 동의어(들): Cristobalite, Quartz, Sand, Silica
• Linear Formula: SiO₂
• CAS Number: 60676-86-0
• Molecular Weight: 60.08
• MDL number: MFCD00011232
• UNSPSC 코드: 12352303
• PubChem Substance ID: 57647755
• NACRES: SB.52

속성

• 양식: solid
• Quality Level: 100
• 품질: acid washed
• 불순물: ≤0.01% in acid soluble iron (Fe); ≤0.5% soluble in HCl
• 손실: ≤0.5% loss on ignition, 800 °C
• refractive index: n20/D 1.544 (lit.)
• mp: 1610 °C (lit.)
• density: 2.6 g/mL at 25 °C (lit.)
• 음이온 미량물: chloride (Cl^-): ≤100 mg/kg
• SMILES string: O=[Si]=O
• InChI: 1S/O2Si/c1-3-2
• InChI key: VYPSYNLAJGMNEJ-UHFFFAOYSA-N

설명

일반 설명

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]

애플리케이션

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]

안전성 정보

• Storage Class Code: 11 - Combustible Solids
• WGK: nwg
• Flash Point (°F): Not applicable
• Flash Point (°C): Not applicable
• 개인 보호 장비: Eyeshields, Gloves, type N95 (US)