L-Epinephrine (Standard) is the standard substance of L-Epinephrine, and it is applicable for quantitative analysis, quality control, and related research in biochemical experiments. L-Epinephrine is a hormone and neurotransmitter primarily secreted by the adrenal medulla, acting as an agonist for α-adrenergic and β-adrenergic receptors, causing systemic vasoconstriction and cardiac stimulation. It is used to treat glaucoma, allergies, and asthma.