Is melatonin polar

Melatonin is considered a relatively non-polar molecule due to its structure, which includes an indole ring and a hydrocarbon tail. While it does contain some polar functional groups, such as the amine and carbonyl groups, the overall balance of its structure leans towards non-polar characteristics. This affects its solubility, making melatonin more soluble in lipids than in water. Thus, it can be classified as a non-polar molecule with some polar features.