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Sigma-Aldrich

4-Oxoisophorone

≥98%, FG

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Synonym(s):
2,6,6-Trimethyl-2-cyclohexene-1,4-dione, 4-Oxoisophorone, Ketoisophorone
Empirical Formula (Hill Notation):
C9H12O2
CAS Number:
1125-21-9
Molecular Weight:
152.19
FEMA Number:
3421
Beilstein:
2207030
EC Number:
214-406-2
Council of Europe no.:
11200
MDL number:
MFCD00043119
PubChem Substance ID:
24901693
Flavis number:
7.109
NACRES:
NA.21

biological source

synthetic

Quality Level

400

grade

FG
Fragrance grade
Halal
Kosher

Agency

follows IFRA guidelines
meets purity specifications of JECFA

reg. compliance

EU Regulation 1223/2009
EU Regulation 1334/2008 & 178/2002

Assay

≥98%

refractive index

n20/D 1.491 (lit.)

bp

222 °C (lit.)
92-94 °C/11 mmHg (lit.)

mp

26-28 °C (lit.)

application(s)

flavors and fragrances

Documentation

see Safety & Documentation for available documents

food allergen

no known allergens

fragrance allergen

no known allergens

Organoleptic

musty; woody; sweet

SMILES string

CC1=CC(=O)CC(C)(C)C1=O

InChI

1S/C9H12O2/c1-6-4-7(10)5-9(2,3)8(6)11/h4H,5H2,1-3H3

InChI key

AYJXHIDNNLJQDT-UHFFFAOYSA-N

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General description

4-Oxoisophorone is a flavor compound found in tobacco and saffron.

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H317

Precautionary Statements

P280 - P302 + P352

Hazard Classifications

Skin Sens. 1

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Worldwide market screening of saffron volatile composition.
Maggi L, et al.
Journal of the Science of Food and Agriculture, 89(11), 1950-1954 (2009)
Study on the flavor change of tobacco powder during enzymatic hydrolysis and Maillard reaction
Wen DM, et al.
Science and Technology of Food Industry, 12, 038-038 (2012)
Mohamed-Elamir F Hegazy et al.
Zeitschrift fur Naturforschung. C, Journal of biosciences, 63(5-6), 403-408 (2008-08-02)
Stereospecific olefin (C=C) and carbonyl (C=O) reduction of the readily available prochiral compound ketoisophorone (2,2,6-trimethyl-2-cyclohexene-1,4-dione) (1) by Marchantia polymorpha and Nicotiana tabacum cell suspension cultures produce the chiral products (6R)-levodione (2), (4R,5S)-4-hydroxy-3,3,5-trimethylcyclohexanone (3), and (4R,6R)-actinol (4) as well as the
Stefano Raimondi et al.
Journal of biotechnology, 156(4), 279-285 (2011-09-22)
Old yellow enzymes (OYEs, EC 1.6.99.1) are flavin-dependent oxidoreductases that catalyze the stereoselective trans-hydrogenation of the double bond, representing a promising alternative to metal-based catalysis. Bioconversion of ketoisophorone (KIP) by 28 non-conventional yeasts belonging to 16 different species was investigated.
Marta Goretti et al.
Bioresource technology, 102(5), 3993-3998 (2011-01-15)
The bioreduction of α,β-unsaturated ketones (ketoisophorone, 2-methyl- and 3-methyl-cyclopentenone) and aldehydes [(S)-(-)-perillaldehyde and α-methyl-cinnamaldehyde] by 23 "non-conventional" yeasts (NCYs) belonging to 21 species of the genera Candida, Cryptococcus, Debaryomyces, Hanseniaspora, Kazachstania, Kluyveromyces, Lindnera, Nakaseomyces, Vanderwaltozyma, and Wickerhamomyces was reported. The
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