• Alfrebro
    • Alfrebro LLC
      Let's get reacquainted
      Building great taste with aroma chemicals, extracts, and distillates
      The Alfrebro brand was established in the early 1900s by Alex Fries & Brothers, a Cincinnati Flavor Company. In 1980, the brand was re-launched as an aroma chemical manufacturer. Since its inception, Alfrebro’s primary focus has been to provide quality natural and high value synthetic chemicals.
      Email: Sarah Forbis
      Email: Sales
      Voice: 513-539-3021
      Fax: 513-539-7372
      US Voice: 513-539-7373
  • Apiscent Labs
    • Apiscent Labs, LLC
      Delivery of Quality
      Custom manufacturer and international supplier of fine ingredients.
      We believe inspired chemistry enriches lives. That's why our team is guided by a mission to provide fine ingredients to the worldwide pharmaceutical, flavor and fragrance markets with a primary focus on the manufacturing of value-added, research-based molecules. We're innovative problem solvers committed to excellence at every phase. Our work builds the foundation for our clients' continued success.
      Email: Info
      Email: Carl Sheeley
      Email: Customer Service
      Voice: +1 (414) 744 3993
      Fax: +1 (414) 744 7111
      2 OCTEN 4 ONE
  • M&U International
    • M&U International LLC
      Steady supply & demand
      Meeting customers increasing demands at home as well as abroad.
      M&U dedicates itself to the development and production of new products as well as continuously promoting those new products. We’ve maintained a steady supply&demand relationship with a large number of manufacturers at home and abroad. We’ve developed an extensive network and because of our relationships with these manufacturers, we’re able to provide a stable supply of great quality materials. We’re located in China’s largest communications hub, Shanghai and in the U.S. near one of the largest sea ports on the East Coast. The strategic locations of our facilities ensure convenient, prompt and secure delivery of our products to our customers. We warmly welcome your inquiries, come witness our solemn commitment for yourself.
      Email: Sales
      US Email: Sales
      Voice: +86-21-32515501 60762991 60762992
      Fax: +86-21-32515502 64204960
      US Voice: 908-359-9000
      US Fax: 908-359-9002
      A0196 2-OCTEN-4-ONE, Kosher
  • Natural Advantage
    • Natural Advantage
      Manufacturer of natural flavor ingredients
      With over 25 years experience in the flavor and food ingredient industries.
      Natural Advantage was formed over seventeen years ago to supply the growing demand for natural food and flavor ingredients. We employ a wide range of multi-disciplined scientists who are dedicated to high quality service, customer satisfaction and creating an outstanding value for our clients.
      Email: Info
      Email: Customer service
      Voice: 318-215-1456
      Fax: 318-335-1579
      Products List: View
  • Penta International
    • Penta International Corporation
      Chemistry innovation
      At Penta, our products and services help businesses do business better.
      For over 30 years, Penta Manufacturing Company has played a growing role in worldwide chemistry innovations and applications. As an industry leader, Penta continues to pioneer chemistry-based solutions for practically every area of commerce. Our products and expertise have helped fuel technical advances in dozens of commercial applications including flavoring, coloring, fragrances and chemical processes.
      US Email: Technical Services
      US Email: Sales
      US Voice: (973) 740-2300
      US Fax: (973) 740-1839
      15-21800 2-OCTEN-4-ONE, Kosher
      15-21805 2-OCTEN-4-ONE, NATURAL, Kosher
  • Riverside Aromatics
    • Riverside Aromatics Ltd.
      Speciality Aroma Chemicals, Naturals and Synthetics
      Specialist raw material suppliers to the Flavour & Fragrance Industry.
      Peter Cannon & David Rowe established Riverside Aromatics in 2006 in Poole, UK, to offer a new type of specialist raw material supplier to the Flavour & Fragrance Industry. We bring together over 40 years of commercial & technical experience in the F&F industry which allows us to understand the needs of the Global F&F business and especially that of the West European Market.
      Email: Info
      Email: Peter Cannon (sales)
      Voice: +44 (0) 1202 679532
      Fax: +44 (0) 1202 679532
      Products List: View
      NO4000 2-Octen-4-one, Natural
  • Treatt
    • Treatt PLC
      Full Range of Naturals
      World-leading, independent ingredients supplier to the flavour and fragrance industries.
      We are proud of our heritage in trading essential oils. Our founder Richard Court Treatt's charismatic and personable approach still embodies the spirit of Treatt today.
      Email: Enquiries
      US Email: Enquiries
      Voice: +44 (0) 1284 702500
      Fax: +44 (0) 1284 703809
      US Voice: +1 863 668 9500
      US Fax: +1 863 668 3388
      2-Octen-4-one Artificial, Kosher

      Used in flavours for confectionery at 5ppm, in dairy products and beverages at 1ppm. Council of Europe limits: Foods (2 ppm); Beverages (1 ppm).
  • Vigon International
    • Vigon International, Inc.
      The Yipppeee! Team
      Manufacturer and supplier of high quality flavor and fragrance ingredients.
      The growth and success of Vigon is due in large part to a unique corporate concept that Vigon has developed and established within the industry: Creative Partnerships. This partnership concept has been and continues to be the foundation and guiding principle for all of Vigon's activities.
      US Email: Sales
      US Voice: 570-476-6300
      US Fax: 570-476-1110
      Products List: View
      505081 Oct-2-en-4-one Natural
Synonyms   Articles   Notes   Search
(E)-oct-2-en-4-one (Click)
CAS Number: 4643-27-0
ECHA EC Number: 225-071-7
MDL: MFCD00061023
FEMA Number: 3603
CoE Number: 2313
XlogP3-AA: 2.10 (est)
Molecular Weight: 126.19878000
Formula: C8 H14 O
NMR Predictor: Predict
Category: flavor and fragrance agents
US / EU / FDA / JECFA / FEMA / FLAVIS / Scholar / Patent Information:
Google Scholar: Search
Google Books: Search
Google Scholar: with word "volatile"Search
Google Scholar: with word "flavor"Search
Google Scholar: with word "odor"Search
Perfumer and Flavorist: Search
Google Patents: Search
US Patents: Search
EU Patents: Search
Pubchem Patents: Search
PubMed: Search
NCBI: Search
Under the conditions of intended use - New developments in the FEMA GRAS program and the safety assessment of flavor ingredients: Read Report
A GRAS assessment program for flavor ingredients: Read Report
Sensory testing for flavorings with modifying properties. Food Technology: Read Report
Criteria for the safety evaluation of flavoring substances: Read Report
A procedure for the safety evaluation of natural flavor complexes used as ingredients in food: essential oils: Read Report
FEMA Expert Panel: 30 Years of safety evaluation for the flavor industry: Read Report
Consumption ratio and food predominance of flavoring materials: Read Report
JECFA Food Flavoring: 1129  2-octen-4-one
Flavis Number: 07.082 (Old)
EU SANCO Food Flavourings: 07.082  oct-2-en-4-one

FEMA Number: 3603  2-octen-4-one
FDA Mainterm: 2-OCTEN-4-ONE
Synonyms   Articles   Notes   Search   Top
Physical Properties:
Appearance: colorless to pale yellow clear liquid (est)
Assay: 96.00 to 100.00 % 
Food Chemicals Codex Listed: No
Boiling Point: 179.00 to  180.00 °C. @ 760.00 mm Hg
Vapor Pressure: 0.897000 mm/Hg @ 25.00 °C. (est)
Flash Point: 136.00 °F. TCC ( 57.78 °C. )
logP (o/w): 2.157 (est)
Shelf Life: 12.00 month(s) or longer if stored properly.
Storage: store in cool, dry place in tightly sealed containers, protected from heat and light.
Synonyms   Articles   Notes   Search   Top
Organoleptic Properties:
Odor Type: yeasty
Odor Strength: high ,
recommend smelling in a 1.00 % solution or less
Odor Description:
at 1.00 % in dipropylene glycol. 
yeast jam preserves tropical fruit mushroom metallic
Odor Description:
at 1.00 %.  
Yeasty, fruity, mushroom, metallic, bready, pineapple, horseradish, earthy
Mosciano, Gerard P&F 26, No. 3, 80, (2001)
Taste Description:
at 2.00 ppm.  
Vegetable green earthy, horseradish, anchovy, earthy, ketonic, onion, musty, tropical lift, yeasty, bready, mushroom, fermented
Mosciano, Gerard P&F 26, No. 3, 80, (2001)
Synonyms   Articles   Notes   Search   Top
Cosmetic Information:
None found
Synonyms   Articles   Notes   Search   Top
Apiscent Labs
Odor: Very powerful green fruity odor reminiscent of mangos
CTC Organics
Endeavour Speciality Chemicals
2-Octen-4-one 98%
M&U International
2-OCTEN-4-ONE, Kosher
Natural Advantage
Penta International
2-OCTEN-4-ONE, Kosher
Penta International
Riverside Aromatics
2-Octen-4-one, Natural
Sigma-Aldrich: Aldrich
For experimental / research use only.
Artificial, Kosher
Odor: green/fruity, pineapple/tropical, ‘dried apricot’
Flavor: green
Used in flavours for confectionery at 5ppm, in dairy products and beverages at 1ppm. Council of Europe limits: Foods (2 ppm); Beverages (1 ppm).
Vigon International
Oct-2-en-4-one Natural
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Safety Information:
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
Hazard statement(s)
None found.
Precautionary statement(s)
None found.
Oral/Parenteral Toxicity:
  Not determined
Dermal Toxicity:
  Not determined
Inhalation Toxicity:
  Not determined
Synonyms   Articles   Notes   Search   Top
Safety in Use Information:
Category: flavor and fragrance agents
Maximised Survey-derived Daily Intakes (MSDI-EU): 0.85 (μg/capita/day)
Maximised Survey-derived Daily Intakes (MSDI-USA): 3.00 (μg/capita/day)
Structure Class: II
Recommendation for 2-octen-4-one usage levels up to:
  0.2000 % in the fragrance concentrate.
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: 12
Click here to view publication 12
 average usual ppmaverage maximum ppm
baked goods: --
beverages(nonalcoholic): -1.00000
beverages(alcoholic): -1.00000
breakfast cereal: --
cheese: --
chewing gum: -10.00000
condiments / relishes: --
confectionery froastings: -5.00000
egg products: --
fats / oils: --
fish products: --
frozen dairy: -1.00000
fruit ices: --
gelatins / puddings: -1.00000
granulated sugar: --
gravies: --
hard candy: --
imitation dairy: --
instant coffee / tea: --
jams / jellies: --
meat products: --
milk products: -1.00000
nut products: --
other grains: --
poultry: --
processed fruits: --
processed vegetables: --
reconstituted vegetables: --
seasonings / flavors: --
snack foods: --
soft candy: --
soups: --
sugar substitutes: --
sweet sauces: --
Synonyms   Articles   Notes   Search   Top
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):
Scientific Opinion on Flavouring Group Evaluation 204 (FGE.204): Consideration of genotoxicity data on representatives for 18 mono-unsaturated, aliphatic, a,ß-unsaturated ketones and precursors from chemical subgroup 1.2.1 of FGE.19 by EFSA
View page or View pdf
EPI System: View
Chemicalize.org: Calculate predicted properties
EPA Substance Registry Services (TSCA): 4643-27-0
EPA ACToR: Toxicology Data
National Institute of Allergy and Infectious Diseases: Data
WGK Germany: 3
Chemidplus: 0004643270
Synonyms   Articles   Notes   Search   Top
NIST Chemistry WebBook: Search Inchi
Canada Domestic Sub. List: 4643-27-0
Pubchem (cid): 5365891
Pubchem (sid): 135264099
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Other Information:
(IUPAC): Atomic Weights of the Elements 2009
(IUPAC): Atomic Weights of the Elements 2009 (pdf)
Videos: The Periodic Table of Videos
tgsc: Atomic Weights use for this web site
(IUPAC): Periodic Table of the Elements
FDA Everything Added to Food in the United States (EAFUS): View
VCF-Online: VCF Volatile Compounds in Food
ChemSpider: View
Synonyms   Articles   Notes   Search   Top
Potential Blenders and core components note
 amyl formateFL/FR
isoamyl isovalerateFL/FR
 benzyl disulfideFL
 bornyl formateFL/FR
 buchu mercaptanFL/FR
(S)-campholene acetateFL/FR
 cassis pentanoneFL/FR
 diisoamyl thiomalateFL
 ethyl (E,Z)-2,4-decadienoateFL/FR
 ethyl 3-octenoateFL
 ethyl 3,5,5-trimethyl hexanoateFR
 fern absolute 
 geranium absoluteFL/FR
 geranyl methyl tiglate 
 heptanal dimethyl acetalFL/FR
(Z)-3-hexen-1-yl tiglateFL/FR
6-hydroxydihydrotheaspirane (mixture of isomers)FL/FR
 linalool oxideFL/FR
 maltyl isobutyrateFL/FR
 methyl 2-(methyl thio) butyrateFL
 methyl thiomethyl butyrateFL
 octyl acetateFL/FR
 octyl isobutyrateFL/FR
 passiflora acetateFL/FR
2-pentyl furanFL/FR
 phenethyl acetateFL/FR
 phenethyl butyrateFL/FR
2-phenyl propyl acetateFL/FR
 propyl nonanoateFL/FR
 propylene glycol acetone ketalFL
 tropical 3-thiobutyrateFL/FR
 tropical indeneFR
 tropical iononeFL/FR
 tropical thiazoleFL/FR
 tropical trithianeFL/FR
Synonyms   Articles   Notes   Search   Top
Potential Uses:
 fruit tropical fruit 
 fungus mushroomFR
 melon watermelon muskmelon cantaloupe 
Synonyms   Articles   Notes   Search   Top
Natural Occurrence in: note
 bread wheat bread
Synonyms   Articles   Notes   Search   Top
 butyl propenyl ketone
2 octen 4 one
2-octen-4-one 96% trans
2-octen-4-one natural
 propenyl butyl ketone
Synonyms   Articles   Notes   Search   Top
Synonyms   Articles   Notes   Search   Top
click on the picture(s) below to
interact with the 3D model
Picture of molecule
Soluble in:
 water, 1045 mg/L @ 25 °C (est)
Insoluble in:
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