Question

What is electrophilic aromatic substitution used for?

Answer 1

EAS is used for plastic production and other proceedings...

Explanation:

Electrophilic Aromatic Substitution `->` organic reaction

...when an electrophile (attracts, receives electrons) replaces an atom (e.g: `H_2`) attached to an aromatic compound.

From Wikipedia :

"The most widely practiced example of this reaction is the ethylation of benzene. Approximately 24,700,000 tons were produced in 1999.[1] (After dehydrogenation and polymerization, the commodity plastic polystyrene is produced.) In this process, solid acids are used as catalyst to generate the incipient carbocation".(...)