产品说明
一般描述
Silica gel is a rigid 3D network of colloidal silica. It is exclusively used as a support material for the active titanium (III) centers in Ziegler-Natta catalysts. Silica gel allows a controlled fragmentation leading to form uniform polymer particles with narrow particle size distribution and high bulk density. Silica gel is classified as below:
a. Aquagel - pores are filled with water
b. Xerogel - by the process of evaporation, aqueous phase in the pores are removed
c. Aerogel - solvent removed by supercritical extraction.
基本信息
EC 号 | 231-545-4 |
MDL编号 | MFCD00011232 |
PubChem化学物质编号 | 329757970 |
NACRES | SB.52 |
产品性质
质量水平 | 100 |
等级 | high-purity grade |
形式 | powder |
manufacturer/tradename | sigma-aldrich |
technique(s) | LPLC: suitable |
缺失 | ~5% loss on drying |
基质 | Silica |
基质活性基团 | silica |
粒径 | 200-400 mesh 40-75 μm |
孔径 | 0.7-0.9 cm3/g pore volume 60 Å pore size |
表面积 | 450-550 m2/g |
pH值(酸碱度) | ~7 (5% in H2O, suspension) |
bp | 2230 ℃ |
mp | >1600 ℃ |
分离技术 | hydrophilic interaction (HILIC) |
SMILES string | O=[Si]=O |
InChI | 1S/O2Si/c1-3-2 |
InChI key | VYPSYNLAJGMNEJ-UHFFFAOYSA-N |
安全信息
储存分类代码 | 11 - Combustible Solids |
WGK | nwg |
闪点(F) | Not applicable |
闪点(C) | Not applicable |