- n-Butyllithium C4H9Li
- Neodymium(III) chloride NdCl3
- Nickel(II) chloride NiCl2
- Nickel(II) hydroxide Ni(OH)2
- Nickelocene Ni(C5H5)2
- Nickel(II) nitrate
- Niobium pentachloride NbCl5
- Nitric acid HNO3
- Nitric oxide NO
- Nitrogen dioxide NO2
- Nitrosylsulphuric acid NOHSO4
- Nitrous oxide N2O

