<unk>  is an ionic solid. Two crystalline forms are known, rhombohedral and hexagonal. Both adopt layered structures. The<unk>  anion is very similar in each form, being centrosymmetric with N–N distances of 1.18 Å. The ion has an octahedral geometry. Each<unk>  is linked to six centers, with three Na-N bonds to each terminal nitrogen center.
Sodium azide
Activated charcoal 
Fomepizole
Methylene blue
Thiamylal
Drotaverine
Pivhydrazine
Barium sulfate suspension