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Sotolon

3-hydroxy-4,5-dimethyl-5H-furan-2-one

Caramel furanone, Fenugreek lactone

Furanone (lactone) · Furanone · C₆H₈O₃

Chemical structure of Sotolon
2D structure PubChem / NCI CIR

Chemical info

CAS number CAS
28664-35-9
Molecular formula
C₆H₈O₃
Molecular weight
128.13 g/mol
Origin
Natural
Odor family
Gourmand
Note
Base
Aroma
Fenugreek, maple syrup and burnt brown sugar with a curry side; extremely powerful.

History

Sotolon is the character odorant of fenugreek seed and lovage; it also occurs in flor sherry, Jura vin jaune and burnt cane sugar.

In perfumery

Used at parts-per-million levels for maple, curry and immortelle effects.

Connections

EvokesSiro phong · Maple syrup, Fenugreek
Found in natureFenugreek, Lovage

Regulatory status

No specific limit
IFRA 51
No dedicated IFRA Standard in the IFRA library as of Amendment 51.
EU CosReg
No specific entry in Annex II or III of Regulation (EC) 1223/2009.
EU allergen 2023/1545
Not on the list of fragrance allergens requiring labelling, including after Regulation (EU) 2023/1545.

Sources

  1. NCI/CADD Chemical Identifier Resolver, CAS 28664-35-9
  2. IFRA Standards Library, Amendments up to 51
  3. Regulation (EC) No 1223/2009, consolidated text of 18.05.2026, Annexes II and III