The present invention is directed to morphic forms, co-crystals, salts, and amorphous solid dispersions of 2-(3,5-dichloro-4-((5-isopropyl-6-oxo-1,6-dihydropyridazin-3-yl)oxy)phenyl)-3,5-dioxo-2,3,4,5-tetrahydro-1,2,4-triazine-6-carbonitrile.本發明關於2-(3,5-二氯-4-((5-異丙基-6-側氧基-1,6-二氫噠嗪-3-基)氧)苯基)-3,5-二側氧基-2,3,4,5-四氫-1,2,4-三嗪-6-腈之形態型式、共晶體、鹽及非晶形固態分散物。