Picoline-N-oxide describes any of three isomers with the formula . All are colorless solids. Their properties and those of pyridine-N-oxide () are similar.
+ Picoline-N-oxides (data from Chemical Abstracts unless noted otherwise) Parameter 2-Picoline-N-oxide 3-Picoline-N-oxide 4-Picoline-N-oxide Melting point (°C) 48-50 39 184 Boiling point (°C) 89-90 (0.8-0.9 Torr) 156 (16 Torr) 122-124 (1.5 Torr)
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