Sharp, pungent and intensely acidic on first sniff — a fatty, buttery-cheesy note with a sour, sweaty edge reminiscent of rancid butter or overripe fruit skins. On extreme dilution it rounds out into a fruity, tropical-buttery facet useful in pineapple, apricot and dairy accords.AI · claude-opus-4-7
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Perfume and Flavor Chemicals, page 230.
Colorless liquid.
Soluble in oils (but will react with many alcohols).
Sharp, irritating, acrid odor.
It is a useful raw material to the perfume chemist in making esters of iso-Butyric acid.
Produced from iso-Butyryl chloride and Sodium acetate, or: from iso-Butyryl chloride and Butyric acid with a catalyst.