CAS #:

Linear Formula:

3Al2O3 • 2SiO2

MDL Number:


EC No.:



(2N) 99% Aluminum Silicon Oxide
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(3N) 99.9% Aluminum Silicon Oxide
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(4N) 99.99% Aluminum Silicon Oxide
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(5N) 99.999% Aluminum Silicon Oxide
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Aluminum Silicon Oxide Properties (Theoretical)

Compound Formula Al6O13Si2
Molecular Weight 426.052432
Appearance crystalline
Melting Point 1810 °C
Boiling Point N/A
Density 2.7 to 3.0 g/cm3
Solubility in H2O 0.07 g/l at 20 °C - insoluble
Electrical Resistivity 10 to 11 10x Ω-m
Poisson's Ratio 0.25
Specific Heat 950 J/kg-K
Tensile Strength 160 MPa (Ultimate)
Thermal Conductivity 3.5 to 11 W/m-K
Thermal Expansion 5.8 µm/m-K
Young's Modulus 110 to 170 GPa
Exact Mass 425.776975
Monoisotopic Mass 425.776975

Aluminum Silicon Oxide Health & Safety Information

Signal Word Danger
Hazard Statements H350i
Hazard Codes T
RTECS Number N/A
Transport Information NONH for all modes of transport
WGK Germany 3

About Aluminum Silicon Oxide

Aluminum Silicon Oxide (Aluminum Silicate) is generally immediately available in most volumes. High purity, submicron and nanopowder forms may be considered. American Elements produces to many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia) and follows applicable ASTM testing standards. Typical and custom packaging is available. Additional technical, research and safety (MSDS) information is available as is a Reference Calculator for converting relevant units of measurement.

Aluminum Silicon Oxide Synonyms

Aluminum silicate, andalusite, kyanite, sillimanite, aluminosilicate, aluminum doped silica, alumina-silica, silicon aluminum oxide, silicon aluminate, Aluminum Oxide/Silicon Oxide; Mullite; hexaaluminumdioxosilane; oxo-oxoalumanyloxy-alumane, Mullite-alpha; Cerabeads 1700, 1260518-72-6, 142844-00-6, 55964-99-3, Al2SiO3

Chemical Identifiers

Linear Formula 3Al2O3 • 2SiO2
MDL Number MFCD00077645
EC No. 215-113-2
Beilstein/Reaxys No. N/A
Pubchem CID 56841936
IUPAC Name dioxosilane; oxo(oxoalumanyloxy)alumane
SMILES O=[Al]O[Al]=O.O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O
InchI Identifier InChI=1S/6Al.2O2Si.9O/c;;;;;;2*1-3-2;;;;;;;;;

Packaging Specifications

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Shipping documentation includes a Certificate of Analysis and Safety Data Sheet (SDS). Solutions are packaged in polypropylene, plastic or glass jars up to palletized 440 gallon liquid totes, and 36,000 lb. tanker trucks.

Related Elements


See more Aluminum products. Aluminum (or Aluminium) (atomic symbol: Al, atomic number: 13) is a Block P, Group 13, Period 3 element with an atomic weight of 26.9815386. It is the third most abundant element in the earth's crust and the most abundant metallic element. Aluminum Bohr Model Aluminum's name is derived from alumina, the mineral from which Sir Humphrey Davy attempted to refine it from in 1812. Aluminum was first predicted by Antoine Lavoisier 1787 and first isolated by Hans Christian Øersted in 1825. Aluminum is a silvery gray metal that possesses many desirable characteristics. It is light, nonmagnetic and non-sparking. It stands second among metals in the scale of malleability, and sixth in ductility. It is extensively used in many industrial applications where a strong, light, easily constructed material is needed. Elemental AluminumAlthough it has only 60% of the electrical conductivity of copper, it is used in electrical transmission lines because of its light weight. Pure aluminum is soft and lacks strength, but alloyed with small amounts of copper, magnesium, silicon, manganese, or other elements, it imparts a variety of useful properties.


See more Silicon products. Silicon (atomic symbol: Si, atomic number: 14) is a Block P, Group 14, Period 3 element with an atomic weight of 28.085. Silicon Bohr MoleculeThe number of electrons in each of Silicon's shells is 2, 8, 4 and its electron configuration is [Ne] 3s2 3p2. The silicon atom has a radius of 111 pm and a Van der Waals radius of 210 pm. Silicon was discovered and first isolated by Jöns Jacob Berzelius in 1823. Silicon makes up 25.7% of the earth's crust, by weight, and is the second most abundant element, exceeded only by oxygen. The metalloid is rarely found in pure crystal form and is usually produced from the iron-silicon alloy ferrosilicon. Elemental SiliconSilica (or silicon dioxide), as sand, is a principal ingredient of glass, one of the most inexpensive of materials with excellent mechanical, optical, thermal, and electrical properties. Ultra high purity silicon can be doped with boron, gallium, phosphorus, or arsenic to produce silicon for use in transistors, solar cells, rectifiers, and other solid-state devices which are used extensively in the electronics industry.The name Silicon originates from the Latin word silex which means flint or hard stone.


February 28, 2024
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