Nicotinamide, also known as niacinamide, is a vitamin found in food, used as a dietary supplement, and used as a medication. As a supplement it is used by mouth to prevent and treat pellagra. Formula: c6h6n2o molar mass: 122.12 gmol iupac id: pyridine-3-carboxamide melting point: 128 °c soluble in: water