1,8-Diaminonaphthalene is an organic compound with the formula C10H6(NH2)2. It is one of the diamine derivatives of naphthalene. It is a colorless solid that darkens in air due to oxidation. It is a precursor to commercial pigments. 1,8-Diaminonaphthalene is an organic compound with the formula C10H6(NH2)2. It is one of the diamine derivatives of naphthalene. It is a colorless solid that darkens in air due to oxidation. It is a precursor to commercial pigments.