Agent Name

Aluminum oxide

Alternative Name

alpha-Alumina

CAS Number

1344-28-1

Formula

Al2-O3

Major Category

Metals

Synonyms

alpha-Alumina; Alumina; Aluminium oxide; Aluminum oxide (2:3); Aluminum sesquioxide; Aluminum trioxide; [CHEMINFO]

Category

Metals, Inorganic Compounds

Description

White, odorless, crystalline powder; [NIOSH]

Sources/Uses

Used to produce aluminum; Also used as an abrasive, catalyst, absorbent (petroleum industry), filler for coatings, food additive; Also used in ceramics, glass, refractories, electrical insulators and resistors, fluxes, dental cements, and chromatographic applications; [CHEMINFO] alpha-Alumina is the main component of technical grade alumina. Corundum is natural Al2O3. Emery is an impure crystalline variety of Al2O3. [NIOSH]

Comments

Alumina is converted into aluminum by electrolytic reduction. Primary aluminum production facilities contain rows of reduction cells or pots located in "potrooms." [Burgess, p. 14] Aluminum oxide is found in nature as bauxite (Al2O3.2H2O). Corundum is manufactured by fusing bauxite in a furnace. Some crystalline silica may be found in bauxite and corundum. "The severe pulmonary fibrosis observed historically in bauxite workers and potroom workers has been primarily attributed to the concurrent exposure to crystalline silica." [CHEMINFO] An irritant of the skin, eyes, and respiratory tract; [CAMEO] See " metal and insoluble compounds."

Exposure Assessment
Skin Designation (ACGIH)

Insufficient data

Bioaccumulates

Yes

TLV (ACGIH)

1 mg/m3, respirable fraction

PEL (OSHA)

15 mg/m3(total dust), 5 mg/m3(respirable fraction)

MAK

4 mg/m3, (inhalable fraction), 1.5 mg/m3 (respirable fraction)

Explanatory Notes

TLV, PEL, and MAK values for aluminum metal and insoluble compounds;

Adverse Effects
Fibrogenic

Yes

ACGIH Carcinogen

Not Classifiable

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Occupational diseases associated with exposure to this agent:

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