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Aluminum oxide

Aluminum oxide Suppliers list
Company Name: Chemson Industrial (Shanghai) Co., Ltd.
Tel: 86-21-65208861-ext8007
Products Intro: Product Name:Alumina; Aluminium Oxide
Purity:99.999%; 99.99%; 99.9% Package:25KG;22.6USD
Company Name: Henan DaKen Chemical CO.,LTD.
Tel: +86-371-55531817
Products Intro: Product Name:Aluminum oxide
Purity:99% Package:100g,500g,1KG,10KG,100KG
Company Name: Henan Tianfu Chemical Co.,Ltd.
Tel: 0371-55170693
Products Intro: CAS:1344-28-1
Purity:99% Package:500G;1KG;5KG;25KG
Company Name: Mainchem Co., Ltd.
Tel: +86-0592-6210733
Products Intro: Product Name:Aluminum oxide
Company Name: Qingdao Hongjin Trading Co., Ltd.
Tel: 0532-83657313
Products Intro: Product Name:α-Alumina;Multiple Channel Micro-Nano Alumina;Aluminium Oxide;Alumina For Heat Conduction Purpose
Purity:99.9% Package:1KG;25KG

Lastest Price from Aluminum oxide manufacturers

  • Alumina; Aluminium Oxide
  • US $22.60 / KG
  • 2018-04-25
  • CAS:1344-28-1
  • Min. Order: 25KG
  • Purity: 99.999%; 99.99%; 99.9%
  • Supply Ability: 1000tons
Aluminum oxide Chemical Properties
Melting point 2040 °C(lit.)
Boiling point 2980°C
density 3.97
vapor pressure 17 mm Hg ( 20 °C)
refractive index 1.765
Fp 2980°C
storage temp. -20°C
solubility Miscible with ethanol.
form powder
color White to pink
PH7.0±0.5 ( in H2O)
Water Solubility INSOLUBLE
Merck 14,356
CAS DataBase Reference1344-28-1(CAS DataBase Reference)
NIST Chemistry ReferenceAluminum oxide(1344-28-1)
EPA Substance Registry SystemAluminum oxide (Al2O3)(1344-28-1)
Safety Information
Hazard Codes Xi,F
Risk Statements 36/37/38-67-36/38-11-36
Safety Statements 26-24/25-16-7-36
RIDADR UN1219 - class 3 - PG 2 - Isopropanol, solution
WGK Germany -
RTECS BD1200000
HazardClass 8
HS Code 28181010
Hazardous Substances Data1344-28-1(Hazardous Substances Data)
ToxicityChronic inhalation of Al2O3 dusts may cause lung damage.
MSDS Information
alpha-Alumina English
SigmaAldrich English
ACROS English
ALFA English
Aluminum oxide Usage And Synthesis
Chemical PropertiesVary according to the method of prepa- ration. White powder, balls, or lumps of various mesh.Insoluble in water, dif- ficultly soluble in mineral acids and strong alkali. Noncombustible.
Chemical PropertiesAluminum is a combustible, light, silverywhite, soft, ductile, malleable, amphoteric metal
Physical propertiesAl2O3 Colorless hexagonal crystal; refractive index 1.768; density 3.965 g/cm3 (at 25°C); mp 2072°C; bp 2980°C; insoluble in water α-Al2O3 Colorless rhombic crystal; mp between 2005 to 2025°C ; density 4.022 g/m3 ; hardness 9Moh γ-Al2O3 white microscopic crystal Al2O3•H2O colorless rhombic crystal; refractive index 1.624; density 3.014 g/cm3 Al2O3•3H2O white monoclinic crystal; refractive index 1.577; density 2.420 g/cm3 All forms are insoluble in water.
UsesOccurs in nature in abundance; the principal forms are bauxites and laterites. The mineral corundum is used to produce precious gems, such as ruby and sapphire. Activated aluminas are used extensively as adsorbents because of their affinity for water and other polar molecules; and as catalysts because of their large surface area and appropriate pore sturcture. As adsorbents, they are used for drying gases and liquids; and in adsorption chromatography. Catalytic properties may be attributed to the presence of surface active sites (primarily OH– , O2– , and Al3+ ions). Such catalytic applications include sulfur recovery from H2S (Clauss catalysis); dehydration of alcohols, isomerization of olefins; and as a catalyst support in petroleum refining.
  • As adsorbent, desiccant, abrasive,thickening and anti-caking agent;
  • As filler for paints and varnishes;
  • In manufacture of alloys,refractories, ceramic materials, electrical insulators and resistors, dental cements, glass, steel, artificial gems; in coatings for metals, etc.;
  • As catalyst for organic reactions.
  • As an insoluble carrier for mineral pigment, and is frequently mixed into mineral powder makeup. Because of its abrasive texture, many use these crystals to exfoliate and resurface the skin-particularly with Microdermabrasion.
  • As a chromotagraphic matrix; originally called Brockmann aluminum oxide when used for this purpose.
  • The minerals corundum (hardness = 9) and Alundum (obtained by fusing bauxite in an electric furnace) are used as abrasives and polishes;
  • In manufacture of cosmetic products like blush, powder foundation, lipstick and facial cleanser.
PreparationPure Aluminum oxide, needed to produce aluminum by the Hall process, is made by the Bayer process. The starting material is bauxite (Al2O3 • nH2O). The ore contains impurities, such as, SiO2, Fe2O3, TiO2, and Na2O. Most impurities are removed following treatment with caustic soda solution. Bauxite is dissolved in NaOH solution. Silica, iron oxides and other impurities are filtered out of the solution. CO2 is then bubbled through this solution. This precipitates are heated to remove water and produce Al2O3. These impurities are removed. Calcinations of bauxite produce Aluminum oxide of abrasive and refractory grades. Activated Aluminum oxide of amorphous type, as well as the transition Aluminum oxides of γ, η, χ, and ρ forms, are obtained from various aluminum hydroxides, such as, α- and β-trihydrates, α-monohydrate and Aluminum oxide gel. Such chemicals are also obtained from bauxite by the Bayer process.
DefinitionThe mineral corundum is natural aluminum oxide, and emery, ruby, and sapphire are impure crystalline varieties. The mixed mineral bauxite is a hydrated aluminum oxide.
ReactionsAluminum oxide exhibits amphoteric behavior. It is soluble both in acids and bases. With acids, it produces their corresponding salts. It froms Al2(SO4)3, Al(NO3)3 and AlCl3 upon reactions with H2SO4, HNO3, and HCl, respectively. In acid medium, it exists as a solvated aluminum ion, in which water molecules are hexacoordinated to trivalent Al3+, as shown below:
Al2O3 + 6H3O+3H2O ——› 2[Al(H2O)6]3+
(Rollinson, C. L., 1978., Aluminum Compounds. In Kirk-Othmer Encyclopedia of Chemical Technology, 3rd ed. Vol 2, pp 188-97. NY,: Wiley Interscience)
Aluminum oxide forms hydroxide in aqueous alkaline solution. The reaction is slow. The products, aluminum hydroxides (hydrated aluminas), contain hexacoordinated aluminohydroxide anion:
Al2O3 + 2OH– + 7H2O → 2[Al(OH)4(H2O)2]–
In its dry state, Aluminum oxide exhibiting basicity reacts with silica, forming aluminum silicate
Al2O3 + 3SiO2 → Al2(SiO3)3
Similarly, with basic CaO or MgO aluminate salts are formed
MgO + Al2O3 → Mg(AlO2)2 CaO + Al2O3 → Ca(AlO2)2
It forms aluminum nitride, AlN when heated with coal in a stream of nitrogen; and aluminum borate, Al2O3 •B2O3 when heated with B2O3 at 1000°C.
General DescriptionWhite odorless crystalline powder. Water insoluble. Properties (both physical and chemical) vary according to the method of preparation; different methods give different crystalline modifications. The variety formed at very high temperature is quite inert chemically.
Air & Water ReactionsInsoluble in water.
Reactivity ProfileAluminum oxide is chemically amphoteric (behaves as a weak acid in the presence of base and as a weak base in the presence of acid). May act catalytically. May cause the exothermic polymerization of ethylene oxide. May cause the vigorous polymerization of vinyl chloride [MCA SD-75, 1970]. The degree of subdivision of the Aluminum oxide may affect the vigor of such reactions.
HazardToxic by inhalation of dust. Confirmed car- cinogen.
Safety ProfileSuspected carcinogen with experimental neoplastigenic and tumorigenic data by implantation. Inhalation of finely divided particles may cause lung damage (Shaver's disease). Exothermic reaction above 200℃ with halocarbon vapors produces toxic HCl and phosgene. See also ALUMINUM COMPOUNDS
Potential ExposureMost hazardous exposures to aluminum occur in smelting and refining processes. Aluminum is mostly produced by electrolysis of Al2O3 dissolved in molten cryolite (Na3AlF6). Aluminum is alloyed with copper, zinc, silicon, magnesium, manganese, and nickel; special additives may include chromium, lead, bismuth, titanium, zirconium, and vanadium. Aluminum and its alloys can be extruded or processed in rolling mills, wire works, forges, or foundries; and are used in the shipbuilding, electrical, building, aircraft, automobile, light engineering, and jewelry industries. Aluminum foil is widely used in packaging. Powdered aluminum is used in the paints and pyrotechnic industries. Alumina, emery, and corundum has been used for abrasives, refractories, and catalysts; and in the past in the first firing of china and pottery.
First aidIf this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit.
ShippingUN1309 Aluminum powder, coated, Hazard Class: 4.1; Labels: 4.1-Flammable solid. UN1383 Pyrophoric metals, n.o.s. or Pyrophoric alloys, n.o.s., Hazard Class: 4.2; Labels: 4.2-Spontaneously combustible material, Technical Name Required. UN1396 Aluminum powder, uncoated, Hazard Class: 4.3; Labels: 4.3-Dangerous when wet material. NA9260 (North America) Aluminum, molten, Hazard class: 9; Labels: 9-Miscellaneous hazardous material.
Purification MethodsStir the oxide with hot 2M HNO3, either on a steam bath for 12hours (changing the acid every hour) or three times for 30minutes, then wash it with hot distilled water until the washings have pH 4, and follow by three washings with hot MeOH. The product is dried at 270o [Angyal & Young J Am Chem Soc 81 5251 1959]. For the preparation of alumina for chromatography see Chapter 1. [For  ,  and  Al2O3 see Becher in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 822-823 1963 and Wagner in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol II p 1662 1965.]
IncompatibilitiesAluminum powder forms an explosive mixture with air and is a strong reducing agent that reacts violently with oxidizers, strong bases; strong acids; somehalogenated hydrocarbons; nitrates, sulfates, metal oxides and many other substances. Keep away from combustible materials.
Waste DisposalConsult with environmental regulatory agencies for guidance on acceptable disposalpractices. Generators of waste containing this contaminant (≥100 kg/mo) must conform with EPA regulations governing storage, transportation, treatment, and waste disposal of Aluminum Oxide-Disposal in a sanitary landfill. Mixing of industrial process wastes and municipal wastes at such sites is not encouraged however. Aluminum powder may be recovered and sold as scrap. Recycling and recovery is a viable option to disposal for aluminum metal and aluminum fluoride (A-57).
Aluminum oxide Preparation Products And Raw materials
Preparation ProductsINVERTASE-->Desulfurizer-->desulfurizating hydrogenation Co-Mo catalysts-->SILICON NITRIDE-->RHODAMINE 110-->ALUMINUM BORATE-->3-Aminobenzamide-->Aluminum dihydrogen phosphate-->ALUMINUM POTASSIUM SULFATE-->ALUMINUM OXIDE,ACTIVATED,NEUTRAL,FOR COLUMN CHROMATOGRAPHY,63-200ΜM-->Lead(II) tetrafluoroborate-->silver catalysts for epoxyethane-->ALUMINUM ZIRCONATE-->Paroxetine-->ammonia synthesis Fe catalysts-->Ceramic pigment-->7-OXABICYCLO[2.2.1]HEPTANE-->2-(1-CYCLOHEXENYL)CYCLOHEXANONE-->Actinomycin D-->Aluminum nitride-->Tri-n-octylamine-->Lo-Han-Kuo extract-->Ethylene oxychlorination catalyst-->catalytic cracking catalyst LC-8-->aluminum dihydrogen tripolyrphosphate-->hydrofining catalysts for raffinate oil-->xylene isomerization catalysts-->carboxyl butadiene-acrylonitrile-epoxy adhesive-->protective catalyst for hydrogenation catalyst-->catalysts for second stage hydrogenation of pyrolysis gasoline-->low palladium content shell-layer catalyst for the first stage hydrogenation of pyrolysis gasoline-->hydrofining catalyst for the feed-stock of reforming process-->atmospheric residue hydrodesulfurization(HDS)catalyst-->selective hydrogenation catalyst of alkynes in C^{4^} cut-->catalyst for benzene oxidation to maleic anhydride-->chlorine removing catalyst(series)-->hydrogenation iron removing catalyst-->active support catalyst-->catalyst for heavy gas oil hydrofining-->JT-1G hydrogenation catalyst
Raw materialsHydrochloric acid-->Sodium carbonate-->Ammonium hydroxide-->Aluminium hydroxide-->Aluminium sulfate-->Aluminium-->CALCIUM CARBONATE-->Magnesium chloride hexahydrate-->Aluminium isopropoxide-->Aluminum ammonium sulfate-->Silica glass-->AMMONIUM ALUM-->Methylene Blue trihydrate-->ALUMINUM INGOTS-->Organic aluminium
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