Aroma ChemicalcheesyTop note
Isobutyric Acid.
Presents a sharp, acidic character with pronounced cheesy and rancid butter notes that can be overwhelming at high concentrations but adds authentic dairy depth at trace levels
CAS Registry
79-31-2
Odor Strength
Medium
Pyramid
Top
IFRA Status
Unrestricted
Cat 4 · Fine fragranceFrom the literature
TGSC, suppliers, and others, quoted as filed.
Luebke, William tgsc, (2017)“Acidic sour cheese dairy buttery rancid”
Ernesto Ventós“Rancid, chesse, butter”
Lluch Essence“Acidic, bitter, rancid butter”
Functional profile
How perfumers typically use Isobutyric Acid — concentration ranges (min · median · max) across community formulas.
Accent
2 formulas
Common formula contexts
Fragrance styles and categories where Isobutyric Acid appears most often.
Complex Composition
1 formula
Woody Aromatic
1 formula
