Pyridine-2-carboxaldehyde has a sharp, roasted-nutty character reminiscent of popcorn, toasted cereals and roasted hazelnut, with a distinctly pyridine-like green, slightly acrid undertone. In dilution it reads as a warm, savoury 'roasted' note with earthy and almost coffee-like nuances.AI · claude-opus-4-7
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Perfume and Flavor Chemicals, page 1218.
Colorless mobile liquid.
Slightly soluble in water, soluble in alcohol and oils.
Pungent bitter-almond-like odor of poor tenacity. Not quite as stinging as Benzaldehyde, but slightly more bitter, unnatural. In extreme dilution quite pleasant, sweet, bitter-almond and nut-like.
The title aldehyde has been suggested as a fragrance material for use as a modifier for Benzaldehyde in technical perfumes, masking odors, etc. for industrial purposes.
1) from the Schiff’s base of para-Nitroso dimethylaniline and 2-Methylpyridinium iodide. 2) by ozonolysis of 2-Stilbazole.