Used as a highly efficient catalyst in asymmetric synthesis, particularly in the enantioselective ring-opening of epoxides and polymerization of lactones. Its chiral salen-aluminum structure enables strong stereocontrol, making it valuable in producing optically active compounds for pharmaceuticals and fine chemicals. The bulky tert-butyl groups enhance both reactivity and selectivity by shielding one face of the metal center. It is also employed in the synthesis of biodegradable polymers with controlled tacticity. Due to its air and moisture sensitivity, it is typically handled under inert atmosphere conditions.