1. Catalyst: Used as a catalyst in organic synthesis reactions, such as in gas-phase chloroalkylation reactions, cyclization reactions, and the synthesis of chlorinated isomers; 2. Ligand: As a ligand applicable in organometallic chemistry, participating in the synthesis of organometallic complexes; 3. Research purposes: As a reagent in chromium chemistry for research, used in the synthesis and exploration of new chemical structures.