The note, in its purest form, presents a piercingly sharp, intensely pungent, and unequivocally sour aroma, often described as vinegary or acrid. It possesses a high initial intensity, striking the olfactory senses with a brisk, almost metallic tang that can be quite aggressive at higher concentrations. Its texture is more conceptual than tactile, evoking a 'cutting' or 'etching' sensation on the palate and nasal passages. As a top note, its extreme volatility ensures an immediate, impactful presence, dissipating relatively quickly, yet leaving a lingering sharp nuance that can influence the heart of a composition. It projects with considerable force initially, though its longevity as a dominant scent is limited to the opening act, where it acts as a vibrant, almost shocking, spark.