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General Material Information

Preferred name alpha-irone
Trivial Name α-Irone
Short Description 4-(2,5,6,6-tetramethyl-2-cyclohexenyl)-3-buten-2-one
Formula C14 H22 O
CAS Number 79-69-6
FEMA Number 2597
Flavis Number 7.011
ECHA Number 201-219-6
FDA UNII O3M0L879K6
Nikkaji Number J4.239K
Beilstein Number 1343498
MDL MFCD00042628
COE Number 145
xLogP3-AA 3.20 (est)
NMR Predictor External link
JECFA Food Flavoring 403 alpha-irone
FDA Patent No longer provide for the use of these seven synthetic flavoring substances
FDA Mainterm 79-69-6 ; ALPHA-IRONE
Synonyms
  • (Z)-2,6-(Z)-21,22-alpha- irone
  • alpha- irone
  • cis-(2,6)-cis- (2(1),2(2))-alpha- irone
  • cis-2,6-cis-21,2 2-alpha- irone
  • irone alfa
  • irone alpha
  • irone alpha refined
  • 6-methyl-alpha-ionone
  • 4-(2,5,6,6-tetramethyl cyclohex-2-enyl) but-3-en-2-one
  • cis-4-(2,5,6,6-tetramethyl cyclohex-2-enyl) but-3-en-2-one
  • (E)-4-(2,5,6,6-tetramethyl-1-cyclohex-2-enyl)but-3-en-2-one
  • 4-(2,5,6,6-tetramethyl-2-cyclohexenyl)-3-buten-2-one
  • 4,2,5,6,6-trimethyl-2-cyclohexen-1-yl-3-buten-2-one
  • (E)-4-(2,5,6,6-tetramethyl-1-cyclohex-2-enyl)but-3-en-2-one
  • 3-Buten-2-one, 4-(2,5,6,6-tetramethyl-2-cyclohexen-1-yl)-
  • α-Ionone, methyl-
  • 4-(2,5,6,6-Tetramethyl-2-cyclohexen-1-yl)-3-buten-2-one
  • α-Irone
  • α-Ionone, 6-methyl-
  • 6-Methyl-α-ionone
  • 4-(2,5,6,6-Tetramethyl-2-cyclohexen-1-yl)-3-butene-2-one
  • Methyl-α-ionone

US / EU / FDA / JECFA / FEMA / Scholar / Patents

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Literature & References

Leffingwell:Chirality or Article
(E)-4-(2,5,6,6-tetramethyl-1-cyclohex-2-enyl)but-3-en-2-one
NIST Chemistry WebBook:Search Inchi
Canada Domestic Sub. List:79-69-6
Pubchem (cid):5371002
Pubchem (sid):134971551
Publications by US Patents
5,113,021 - Process for the manufacture of a mixture of .alpha.- and .beta.-irone
Publications by PubMed
New constituents from the rhizomes of Egyptian Iris germanica L.
Fragrance material review on alpha-irone.

Other Information

(IUPAC):Atomic Weights of the Elements 2011 (pdf)
Videos:The Periodic Table of Videos
tgsc:Atomic Weights use for this web site
(IUPAC):Periodic Table of the Elements
FDA Substances Added to Food (formerly EAFUS):View
CHEBI:View
CHEMBL:View
KEGG (GenomeNet):C09690
HMDB (The Human Metabolome Database):HMDB35631
FooDB:FDB014339
Export Tariff Code:2914.23.0000
VCF-Online:VCF Volatile Compounds in Food
ChemSpider:View
Wikipedia:View

PhysChem Properties

Material listed in food chemical codex No
Molecular weight 206.3285369873
Specific gravity @ 25 °C
Pounds per Gallon 7.755 to 7.813
Refractive Index 1.497 to 1.503 @ 20 °C
Boiling Point 110 to 112°C @ 3 mm Hg
Boiling Point 68 to 73°C @ 0.01 mm Hg
Acid Value 1 max KOH/g
Vapor Pressure 0.004 mmHg @ 25 °C
Flash Point TCC Value 100 °C TCC
logP (o/w) 4.354 est
Solubility
alcohol Yes
water, 110 mg/L @ 20 °C (exp) Yes
Stability
alcoholic Good
soap Good
toiletry Good
bath foam Unspecified
non-discoloring in most media Unspecified
ph = 10 moderate Unspecified
ph = 2 poor Unspecified
powder detergent Moderate
antiperspirant spray Poor

Organoleptic Properties

Odor Type: Floral
orris, floral, berry, violet, woody, powdery, sweet, raspberry
Odor strength medium , recommend smelling in a 10.00 % solution or less
Substantivity 104 hour(s) at 100.00 %
Luebke, William tgsc, (1986) At 10.00 % in dipropylene glycol. orris floral berry violet woody powdery
Mosciano, Gerard P&F 19, No. 5, 79, (1994) Sweet, orris, woody, raspberry and powdery
Flavor Type: Woody
woody, fruity, raspberry, orris, berry, seedy
Mosciano, Gerard P&F 19, No. 5, 79, (1994) At 10.00 ppm. Woody, fruity, raspberry, orris and berry with seedy nuances

Occurrences

Potential Uses

Applications
Odor purposes Berry, Floral, Orris, Powder, Raspberry, Violet, Wallflower
Other purposes Seedy
Cosmetic purposes Perfuming agents

Safety Information

Safety information

Preferred SDS: View
European information :
Most important hazard(s):
None - None found.
S 23 - Do not breath vapour.
S 24 - Avoid contact with skin.
S 25 - Avoid contact with eyes.
Hazards identification
Classification of the substance or mixture
GHS Classification in accordance with 29 CFR 1910 (OSHA HCS)
None found.
GHS Label elements, including precautionary statements
Pictogram
Hazard statement(s)
None found.
Precautionary statement(s)
None found.
Oral/Parenteral Toxicity:
oral-rat LD50 5000 mg/kg

Dermal Toxicity:
skin-rabbit LD50 5000 mg/kg

Inhalation Toxicity:
Not determined

Safety in use information

Category:
flavor and fragrance agents
RIFM Fragrance Material Safety Assessment: Search
IFRA Code of Practice Notification of the 49th Amendment to the IFRA Code of Practice
IFRA Critical Effect:
Dermal sensitization
IFRA Other Specification:
maximum skin levels for fine fragrances:
0.2900 % and are based on the assumption that the fragrance mixture is used at 20% in a consumer product (IFRA Use Level Survey).(IFRA, 2001)
Recommendation for alpha-irone usage levels up to:
2.0000 % in the fragrance concentrate.
use level in formulae for use in cosmetics:
0.2200 %
Dermal Systemic Exposure in Cosmetic Products:
0.0055 mg/kg/day (IFRA, 2001)
Maximised Survey-derived Daily Intakes (MSDI-EU): 7.70 (μg/capita/day)
Maximised Survey-derived Daily Intakes (MSDI-USA): 3.00 (μg/capita/day)
Structure Class: I
Use levels for FEMA GRAS flavoring substances on which the FEMA Expert Panel based its judgments that the substances are generally recognized as safe (GRAS).
The Expert Panel also publishes separate extensive reviews of scientific information on all FEMA GRAS flavoring substances and can be found at FEMA Flavor Ingredient Library
publication number: 3
Click here to view publication 3
average usual ppmaverage maximum ppm
baked goods: -5.40000
beverages(nonalcoholic): -1.20000
beverages(alcoholic): --
breakfast cereal: --
cheese: --
chewing gum: -1.40000
condiments / relishes: --
confectionery froastings: --
egg products: --
fats / oils: --
fish products: --
frozen dairy: -2.30000
fruit ices: -2.30000
gelatins / puddings: --
granulated sugar: --
gravies: --
hard candy: -4.10000
imitation dairy: --
instant coffee / tea: --
jams / jellies: --
meat products: --
milk products: --
nut products: --
other grains: --
poultry: --
processed fruits: --
processed vegetables: --
reconstituted vegetables: --
seasonings / flavors: --
snack foods: --
soft candy: --
soups: --
sugar substitutes: --
sweet sauces: --

Safety references

European Food Safety Athority(EFSA):Flavor usage levels; Subacute, Subchronic, Chronic and Carcinogenicity Studies; Developmental / Reproductive Toxicity Studies; Genotoxicity Studies...

European Food Safety Authority (EFSA) reference(s):

Flavouring Group Evaluation 210: alpha,beta-Unsaturated alicyclic ketones and precursors from chemical subgroup 2.4 of FGE.19[1]
View page or View pdf

Scientific Opinion on Flavouring Group Evaluation 210 Revision 2 (FGE.210Rev2): Consideration of genotoxic potential for a,ß-unsaturated alicyclic ketones and precursors from chemical subgroup 2.4 of FGE.19
View page or View pdf

Safety and efficacy of secondary alicyclic saturated and unsaturated alcohols, ketones, ketals and esters with ketals containing alicyclic alcohols or ketones and esters containing secondary alicyclic alcohols from chemical group 8 when used as flavourings for all animal species
View page or View pdf

Scientific Opinion on Flavouring Group Evaluation 210 Revision 3 (FGE.210Rev3): Consideration of genotoxic potential for a,ß-unsaturated alicyclic ketones and precursors from chemical subgroup 2.4 of FGE.19
View page or View pdf

EPI System: View
AIDS Citations:Search
Cancer Citations:Search
Toxicology Citations:Search
EPA Substance Registry Services (TSCA):79-69-6
EPA ACToR:Toxicology Data
EPA Substance Registry Services (SRS):Registry
Laboratory Chemical Safety Summary :5371002
National Institute of Allergy and Infectious Diseases:Data
WGK Germany:2
(E)-4-(2,5,6,6-tetramethyl-1-cyclohex-2-enyl)but-3-en-2-one
Chemidplus:0000079696
RTECS:EN0335000 for cas# 79-69-6