1,5-Diaminonaphthalene is an organic compound with the formula C10H6(NH2)2.

It is a colorless solid that darkens in air due to oxidation.

It is prepared by reduction of 1,5-dinitronaphthalene, which in turn is obtained with the 1,8-isomers by nitration of 1-nitronaphthalene.

It can also be prepared by treatment of 1,5-dihydroxynaphthalene with ammonium sulfite.

It is a precursor to naphthalene-1,5-diisocyanate, a precursor to specialty polyurethanes.