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701491 Sigma-Aldrich

Silicon dioxide, alumina doped

nanoparticles, dispersion, <50 nm particle size, 20 wt. % in H2O, 99.99% trace metals basis

Synonym: silicic anhydride, alumina doped preparation

  • Linear Formula (SiO2)x(Al2O3)y

  • Molecular Weight 60.08

  •  MDL number MFCD06202255

  •  PubChem Substance ID 329762295

  •  NACRES NA.23



Related Categories 14: Si, Biomedical Materials, Materials Science, Metal and Ceramic Science, Nanomaterials,
Quality Level   100
assay   99.99% trace metals basis
form   dispersion
composition   aluminum, 7.5 wt. %
concentration   20 wt. % in H2O
particle size   <50 nm
surface area   spec. surface area 75.5 m2/g (BET)
pH   4-6(neat)
density   1.087 g/mL at 25 °C
SMILES string   O=[Si]=O.O=[Al]O[Al]=O
InChI   1S/2Al.O2Si.3O/c;;1-3-2;;;


General description

Contains 0.025 wt. % Ammonium hydroxide.


25, 100 mL in poly bottle

Legal Information

Product of Engi-Mat Co.

Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 
Flash Point(F) 
>230 °F
Flash Point(C) 
>110 °C


Certificate of Analysis (COA)

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Protocols & Articles


Advanced Inorganic Materials for Solid State Lighting

In 1907, the first electroluminescent device, with silicon carbide (Prod. Nos. 594911, 378097, 357391) as the active material, was described by Henry Round as displaying a “bright glow”.1,2 Lighting ...
Alexander Birkel, Kristin A. Denault, Nathan C. George, Ram Seshadri
Material Matters, Volume 7, Number 2, 22–27
Keywords: Capillary electrophoresis, Chromatin immunoprecipitation, Combustion, Ligands, Microwave synthesis, Sol-gel, Substitutions

Bio-Inspired “Green” Synthesis of Nanomaterials and their Applications

Dr. Siddharth V. Patwardhan Department of Chemical and Process Engineering University of Strathclyde, 75 Montrose Street Glasgow G1 1XJ, UK Email: Siddharth.Patwardhan@strath.ac.uk
Keywords: Adsorption, Agriculture, Apoptosis, Cancer, Catalysis, Condensations, Cosmetics, Deposition, Environmental, Enzyme activity, Green chemistry, Hydration reaction, Immobilization, Microwave synthesis, Nanomaterials, Pharmaceutical, Precipitation, Reductions, Separation, Sol-gel, Solvents

Materials for Clean H2 Production from Bioethanol Reforming

Hong Xie, Eric Weitz, and Kenneth R. Poeppelmeier* Center for Catalysis and Surface Science, Department of Chemistry Northwestern University Evanston, Illinois 60208 *krp@northwestern.edu
Keywords: Absorption, Adsorption, Boudouard reaction, Catalysis, Dehydration reaction, Dehydrogenation, Deposition, Fermentation, Polymerization reactions, Precipitation, Redox Reactions, Renewable energy, Surface Science

Recent Developments in Silicon Anode Materials for High Performance Lithium-Ion Batteries

Xuefeng Song,1* Xiaobing Wang,2 Zhuang Sun,1 Peng Zhang,1 and Lian Gao1 1State Key Laboratory for Metallic Matrix Composite Materials, School of Materials Science and Engineering, Shanghai Jiao Tong ...
Keywords: Automotive, Deposition, Diffusion, Electrochemical reactions, Environmental, Lithiations, Materials Science, Microscopy, Nanomaterials, Nanotubes, Polymerization reactions, Reductions, Scanning electron microscopy, Transmission electron microscopy

Peer-Reviewed Papers


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