This napthelene derivative, also known as naphthalene 1,5-diisocyanate, presents as a white to pale yellow crystalline powder. Store in a refrigerator, under inert gas and protected from moisture. 1,5-Diisocyanatonaphthalene is known to be incompatible with oxidizing agents, acids, bases, reducing agents, water, alcohols and amines and should not be stored or handled in their vicinity.