381276 Aldrich



Synonym: Silica, fumed, Silica, Silicic anhydride, Silicon dioxide amorphous, Silicon dioxide



Related Categories Materials Science, Metal and Ceramic Science, Oxides, Silicon
assay   99.8%
surface area   175-225 m2/g


Features and Benefits

Has interesting thickening and thixotropic properties, and an enormous external surface area.

Other Notes

Particle sizes are for primary particles, which form branched, chain-like aggregates a few tenths of a micron long.

May contain adsorbed H2O and CO2 which is removable by calcining at >900°C


100 g in poly bottle

500 g in poly drum


Silica was used in synthesis of silicalite.1 Silica was used to assist the catalytic growth of oxide and nitride nanowires.2

General description

Silica is a naturally occurring material in minerals, flint and in some plants in crystalline phase. Silica commonly used in industries is in synthetic form. Surface area, pore volume, pore size and particle size are independently controllable to some extent. The crystalline silica may be classified based on atmospheric pressure as:
a. Quartz: = 1143K
b. Tridymite: 1143 - 1743K
c. Cristobalite: = 1743, over 1973K it forms amorphous vitreous silica glass.3

Price and Availability

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nanopowder, spec. surface area 175-225 m2/g (BET), 99.8% trace metals basis


nanoparticles, mesoporous, 200 nm particle size, pore size 4 nm

Silica, fumed

powder, 0.2-0.3 μm avg. part. size (aggregate)

Silica, fumed

powder, 0.007 μm

Safety & Documentation

Safety Information

WGK Germany 
Protocols & Articles


Synthesis of ZnO Aggregates and Their Application in Dye-sensitized Solar Cells

Solar energy, as the primary source of energy for all living organisms on Earth, is considered the ultimate solution to the energy and environmental challenge as a carbon-neutral energy source. Many ...
Qifeng Zhang, Kwangsuk Park, Guozhong Cao
Material Matters 2010, 5.2, 32.
Keywords: Absorption, Adsorption, Atomic layer deposition, Calorimetry, Centrifugation, Chemical reactions, Degradations, Deposition, Diffraction, Diffusion, Environmental, Hydrogenations, Ligands, Materials Science, Methods, Photovoltaics, Precipitation, Recombination, Scanning electron microscopy, Semiconductor, Solar cells, Spectra, Spectroscopy, Type, Usage, X-Ray diffraction

Peer-Reviewed Papers


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1. Synthesis of silicalite-1 from organo-silicic gels. Sánchez-Flores NA, Pacheco-Malagón G, Pérez-Romo P, et al. J. Colloid. Interface Sci. 323(2), 359-64, (2008)


2. Silica-assisted catalytic growth of oxide and nitride nanowires. Tang, C. C., et al. Chem. Phys. Lett. 333, 12-15, (2001)

3. The Heat Capacities of Quartz, Cristobalite and Tridymite at Low Temperatures Anderson, C. Travis. J. Am. Chem. Soc. 58, 568-570, (1936)

Vacuolar-ATPase isoform a2 regulates macrophages and cytokine profile necessary for normal spermatogenesis in testis. Jaiswal MK, Katara GK, Mallers T, et al. J. Leukoc. Biol. 96(2), 337-47, (2014)


Hemocompatibility evaluation of small elastomeric hollow fiber membranes as vascular substitutes. Mercado-Pagán ÁE, Ker DF, Yang Y, et al. J. Biomater. Appl. 29(4), 557-65, (2014)


Facilitated preparation of bioconjugatable zwitterionic quantum dots using dual-lipid encapsulation. Shrake R, Demillo VG, Ahmadiantehrani M, et al. J. Colloid. Interface Sci. 437, 140-6, (2014)


CKD-516 displays vascular disrupting properties and enhances anti-tumor activity in combination with chemotherapy in a murine tumor model. Moon CH, Lee SJ, Lee HY, et al. Invest. New Drugs 32(3), 400-11, (2014)


Cytotoxicity and genotoxicity of orthodontic bands with or without silver soldered joints. Gonçalves TS, Menezes LM, Trindade C, et al. Mutat. Res. Genet. Toxicol. Environ. Mutagen. 762, 1-8, (2014)


Magnesium isoglycyrrhizinate protects hepatic L02 cells from ischemia/reperfusion induced injury. Huang X, Qin J, Lu S, et al. Int. J. Clin. Exp. Pathol. 7(8), 4755-64, (2014)


Functional characterisation and permeation studies of lyophilised thiolated chitosan xerogels for buccal delivery of insulin. Boateng JS, Mitchell JC, Pawar H, et al. Protein Pept. Lett. 21(11), 1163-75, (2014)


Multiwavelength photoacoustic imaging and plasmon resonance coupling of gold nanoparticles for selective detection of cancer. Srivalleesha Mallidi et al Nano Lett. 9, 2825-31, (2010)


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