Product name: Melatonin Powder CAS Number.: 73-31-4; 8041-44-9 Molecular formula: C13H16N2O2 Assay: 99% Appearance: white powder What is Melatonin ? Melatonin is a hormone made by the pineal gland, a small gland in the brain. Melatonin helps control your sleep and wake cycles. Very small amounts of it are found in foods such as meats, grains, fruits, and vegetables. Your …