krizen

listen to the pronunciation of krizen
التركية - الإنجليزية
chrysene
A polycyclic aromatic hydrocarbon, 1,2-benzphenanthrene, containing four fused benzene rings
One of the higher aromatic hydrocarbons of coal tar, allied to naphthalene and anthracene
It is a white crystalline substance, C18H12, of strong blue fluorescence, but generally colored yellow by impurities