Adrenalone Hydrochloride Hydrate is primarily used in medical and research settings as a precursor in the synthesis of adrenaline (epinephrine), a critical hormone and neurotransmitter. It is also employed in ophthalmic applications, where it acts as a vasoconstrictor to reduce redness and swelling in the eyes. Additionally, it serves as a research chemical in studies focused on understanding adrenergic receptors and their mechanisms in the body. Its vasoconstrictive properties make it useful in controlling minor bleeding during surgical procedures.