(2-Bromoethyl)cyclopropane (CAS# 36982-56-6) is used as a reagent to synthesize 22-Hydroxycholesterol (H918010) derivatives, compounds that act as serum cholesterol lowering agents. 2-Bromoethylcyclopropane is also used to prepare pyridazinones, compounds that act as cyclooxygenase 2-inhibitors (they possess anti-inflammatory and antiangiogenic effects).