DIHYDO-ALPHA-IONONE

Synonym(s):4-(2,6,6-Trimethyl-2-cyclohexen-1-yl)-2-butanone

Reported found in blackberry, raspberry, tea, peach and green tea.

By partial hydrogenation of α-ionone.

ChEBI: 7,8-Dihydro-alpha-ionone is a sesquiterpenoid.

Aroma characteristics at 10% ETOH: woody, floral, berry, fruity with orris powdery undertones

Taste characteristics at 2 ppm: berry, floral, woody, seedy with a fruity undertone.

Synthesis, p. 596, 1976 DOI: 10.1055/s-1976-24130
Tetrahedron, 42, p. 4603, 1986 DOI: 10.1016/S0040-4020(01)87304-X
Tetrahedron Letters, 37, p. 3529, 1996 DOI: 10.1016/0040-4039(96)00604-1

Boiling point:	90 °C0.1 mm Hg(lit.)
Density	0.922 g/mL at 20 °C(lit.)
vapor pressure	1.83-35.4Pa at 20-50℃
FEMA	3628 \| DIHYDRO-ALPHA-IONONE
refractive index	n20/D 1.477
Flash point:	98 °C
form	Liquid
Odor	at 10.00 % in dipropylene glycol. woody floral berry orris powdery violet raspberry fruity
JECFA Number	393
BRN	2088879
EPA Substance Registry System	2-Butanone, 4-(2,6,6-trimethyl-2-cyclohexen-1-yl)- (31499-72-6)

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.