Aluminum makes reference to the most common metal on earth, constituting 8% of the earth's crust but never found naturally in its pure form.

Aluminum metal is produced by separating aluminum from oxygen in alumina.

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"Aluminum" is in the NAICS Code "322225"
(Laminated Aluminum Foil Manufacturing for Flexible Packaging UsesLaminated Aluminum Foil Manufacturing for Flexible Packaging Uses)