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Aluminum oxide

Aluminum oxide
Aluminum oxide
CAS No.
1344-28-1
Chemical Name:
Aluminum oxide
Synonyms
AD3;la6;ps1;Rex;RUBY;AD3H;H-30;khp2;Mafe;T-64
CBNumber:
CB9853056
Molecular Formula:
Al2O3
Formula Weight:
101.96
MOL File:
1344-28-1.mol

Aluminum oxide Properties

Melting point:
2040 °C(lit.)
Boiling point:
2980°C
Density 
3.97
vapor pressure 
17 mm Hg ( 20 °C)
refractive index 
1.765
Flash point:
2980°C
storage temp. 
-20°C
solubility 
Miscible with ethanol.
form 
powder
color 
White to pink
PH
7.0±0.5 ( in H2O)
Water Solubility 
INSOLUBLE
Merck 
14,356
InChIKey
PNEYBMLMFCGWSK-UHFFFAOYSA-N
CAS DataBase Reference
1344-28-1(CAS DataBase Reference)
NIST Chemistry Reference
Aluminum oxide(1344-28-1)
EPA Substance Registry System
Aluminum oxide (Al2O3)(1344-28-1)
SAFETY
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
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
3
TSCA  Yes
HazardClass  8
HS Code  28181010
Hazardous Substances Data 1344-28-1(Hazardous Substances Data)
Toxicity Chronic inhalation of Al2O3 dusts may cause lung damage.
Symbol(GHS):
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H222 Extremely flammable aerosol Flammable aerosols Category 1 Danger P210, P211, P251, P410+P412
H225 Highly Flammable liquid and vapour Flammable liquids Category 2 Danger P210,P233, P240, P241, P242, P243,P280, P303+ P361+P353, P370+P378,P403+P235, P501
H226 Flammable liquid and vapour Flammable liquids Category 3 Warning
H304 May be fatal if swallowed and enters airways Aspiration hazard Category 1 Danger
H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501
H318 Causes serious eye damage Serious eye damage/eye irritation Category 1 Danger P280, P305+P351+P338, P310
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H333 May be harmful if inhaled Acute toxicity,inhalation Category 5 P304+P312
H336 May cause drowsiness or dizziness Specific target organ toxicity,single exposure; Narcotic effects Category 3 Warning P261, P271, P304+P340, P312,P403+P233, P405, P501
Precautionary statements:
P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P240 Ground/bond container and receiving equipment.
P241 Use explosion-proof electrical/ventilating/lighting/…/equipment.
P251 Pressurized container: Do not pierce or burn, even after use.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P331 Do NOT induce vomiting.
P301+P330+P331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P405 Store locked up.
P410+P412 Protect from sunlight. Do not expose to temperatures exceeding 50 oC/122oF.

Aluminum oxide price More Price(230)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 11028 Aluminum oxide puriss., ≥98% Al2O3 basis 1344-28-1 500g $41.9 2018-11-13 Buy
Sigma-Aldrich 05184 Aluminum oxide for the determination of hydrocarbons 1344-28-1 100g-f $118 2018-11-13 Buy
Alfa Aesar 010459 Aluminum oxide, gamma-phase, alpha-phase, 99.98% (metals basis) 1344-28-1 100g $99.2 2018-11-16 Buy
Alfa Aesar 010459 Aluminum oxide, gamma-phase, alpha-phase, 99.98% (metals basis) 1344-28-1 25g $46.2 2018-11-16 Buy
Strem Chemicals 13-0750 alpha-Alumina, 99.5+% 1344-28-1 500g $70 2018-11-13 Buy

Aluminum oxide Chemical Properties,Uses,Production

Chemical Properties

Vary 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 Properties

Aluminum is a combustible, light, silverywhite, soft, ductile, malleable, amphoteric metal

Physical properties

Al2O3 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.

Uses

Occurs 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.

Uses

 

Preparation

Pure 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.

Definition

The mineral corundum is natural aluminum oxide, and emery, ruby, and sapphire are impure crystalline varieties. The mixed mineral bauxite is a hydrated aluminum oxide.

Reactions

Aluminum 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 Description

White 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 Reactions

Insoluble in water.

Reactivity Profile

Aluminum 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.

Hazard

Toxic by inhalation of dust. Confirmed car- cinogen.

Safety Profile

Suspected 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 Exposure

Most 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 aid

If 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.

Shipping

UN1309 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 Methods

Stir 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.]

Incompatibilities

Aluminum 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 Disposal

Consult 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

Raw materials

Preparation Products


Aluminum oxide Suppliers

Global( 262)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Chemson Industrial (Shanghai) Co., Ltd.
86-21-65208861-ext8007
86-21-65180813 sales1@chemson.com.cn CHINA 121 58
Henan DaKen Chemical CO.,LTD.
+86-371-55531817
info@dakenchem.com CHINA 22059 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693
0371-55170693 info@tianfuchem.com CHINA 20795 55
Mainchem Co., Ltd.
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+86-0592-6210733 sales@mainchem.com CHINA 32764 55
Qingdao Hongjin Trading Co., Ltd.
0532-83657313
hjt@hong-jin.com CHINA 113 58
Sinopharm Chemical Reagent Co,Ltd. 86-21-63210123
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Shanghai Aladdin Bio-Chem Technology Co.,LTD 021-20337333/400-620-6333
021-50323701 sale@aladdin-e.com China 25127 65
klamar reagent 4001650900
021-64897811 sales-wang@klamar-reagent.com China 1997 55
Forsman Scientific ( Beijing ) Co., Ltd. +86-10-6464 6565
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Hunan Jiahang Medical Technology Co. Ltd. 0731-85567275 /17773132550 / 18932438858
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View Lastest Price from Aluminum oxide manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2018-04-24 Alumina; Aluminium Oxide
1344-28-1
US $22.60 / KG 25KG 99.999%; 99.99%; 99.9% 1000tons Chemson Industrial (Shanghai) Co., Ltd.

Aluminum oxide Spectrum


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