Sulfonated melamine formaldehyde (melamine), commonly known as melamine, protein essence, molecular formula is C3H6N6, IUPAC named “1,3, 5-triazine-2,4, 6-triamine”, is a triazine-containing heterocyclic organic compounds as chemical raw materials. It is a white monoclinic crystal, almost odorless, slightly soluble in water (at room temperature 3.1g/L), soluble in methanol, formaldehyde, acetic acid, hot glycol, glycerin, pyridine, etc., insoluble in acetone, ether, harmful to human body, can not be used in food processing or food additives.