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1. Aluminum chloride is mainly used in Friedel‑Crafts reactions, for example, in the preparation of anthraquinone from benzene and phosgene, which is applied in the dyeing and finishing industry.

2. When benzene and its derivatives undergo the above reactions, the main product is the para isomer.

3. Aluminum chloride has a wide range of applications in organic chemistry.

4. AlCl₃ is also commonly used in hydrocarbon polymerization and isomerization reactions; an important industrial example is the production of ethylbenzene.

5. Used as a catalyst in organic synthesis, such as petroleum cracking, synthetic dyes, synthetic rubber, synthetic detergents, pharmaceuticals, fragrances, etc.

6. Used in the manufacture of pesticides, organoaluminum compounds, catalysts for phthalocyanine organic pigments, and catalysts for ethylbenzene production.

7. Used in metal smelting and lubricating oil synthesis.

8. Food-grade products are used as leavening agents, anti‑discoloration agents for sake, etc., and flocculants for pectin.

9. Used as an analytical reagent, preservative, and mordant.