They are heterocycles of the triazine class. Atrazine is an herbicide of the triazine class. Atrazine is a herbicide of the triazine class. Simazine is an herbicide of the triazine class. Phenyltriazines are a class of molecules containing a phenyl group and a triazine group. Inorganic sources as moronic acts, metal chelates and triazine dyes. It belongs to the group of triazine herbicides, just as atrazine. It is a non-selective herbicide from the triazine family. A well known triazine is melamine (2,4,6-triamino-1,3,5-triazine). Another important triazine is cyanuric chloride (2,4,6-trichloro-1,3,5-triazine). Modern syntheses employ hexahydro triacyl triazine as it avoids formation of HMX. Like atrazine, a related triazine herbicide, it acts by inhibiting photosynthesis. Simple cyclic triketones include cyclopropanetrione, barbituric acid and the triazine cyanuric acid. Many reactive dyes also incorporate a triazine ring. Ammelide (6-amino-2,4-dihydroxy-1,3,5-triazine) is a triazine and the hydrolysis product of ammeline.