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Online Edition: "Specifications for Flavourings"

Flavouring 4,5-Octanedione
Synonym(s) Bibutyryl;4,5-Octadione;Dipropyl diketone;Di-n-butyryl
Latest JECFA evaluation 2010 (Session 73)
Status of specification Full
Chemical name octane-4,5-dione
JECFA number 2037
CAS number 5455-24-3
FEMA number 4533
COE number
FLAVIS number
Molecular weight 142.2
Chemical formula C8H14O2
Physical form/odour Yellow liquid; At high concentration powerful pungent, fatty buttery aroma; upon dilution pleasant creamy-buttery aroma
Solubility Practically insoluble or insoluble in water
Solubility in ethanol Soluble
Boiling point (°C) 68-70° (20 mm Hg)
Assay min % 95%
Acid value max
Refractive index 1.414-1.424
Specific gravity 0.908-0.918 (20°)
Other requirements
ID Test MS