What are the dominant forces in disperse red 1? Is it considered highly polar, slightly polar, or nonpolar? What are the dominant forces in disperse red 1? Is it considered highly polar, slightly polar, or nonpolar? Solution Dominant forces: Polar molecule: polar molecule have dipole and ability to form hydrogen bonding. so dominant force are hydrogen bonding, dipole - dipole interaction. slightly polar molecule: slightly polar molecule have dipole. so dominant force is dipole-dipole interaction. Nonpolar molecule: Nonpolar molecule have no dipole. so there are dispersion force among the molecules. so dominant force is dispersion force. .