31623
二氧化硅
washed and calcined, analytical reagent
别名:
白石英砂, 二氧化硅, 石英
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关于此项目
线性分子式:
SiO2
化学文摘社编号:
分子量:
60.08
NACRES:
SB.52
PubChem Substance ID:
UNSPSC Code:
12352300
EC Number:
238-878-4
MDL number:
form
granular
Quality Segment
quality
washed and calcined, analytical reagent
impurities
≤0.2% Soluble in HCl
loss
≤0.1% loss on ignition
granulation
0.1-0.5 mm (min.70%)
anion traces
chloride (Cl-): ≤100 mg/kg
SMILES string
O=[Si]=O
InChI
1S/O2Si/c1-3-2
InChI key
VYPSYNLAJGMNEJ-UHFFFAOYSA-N
General description
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.
Application
Silicon dioxide may be used to produce silicon by electrochemical reduction in the presence of calcium chloride (CaCl2) electrolyte.
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存储类别
13 - Non Combustible Solids
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nwg
闪点 (F)
Not applicable
闪点 (°C)
Not applicable
PPE（个人防护设备）
dust mask type N95 (US), Eyeshields, Gloves