2,5-diethyl tetrahydrofuran
2,5-diethyltetrahydrofuran
 
Notes:
Used in flavour compositions. Present in Spanish origanum (Coridothymus capitatus) and lemon balm (Melissa officinalis)
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2,5-diethyloxolane (Click)
CAS Number: 41239-48-9Picture of molecule
ECHA EINECS - REACH Pre-Reg: 255-274-6
FDA UNII: 4L4S1F79CT
Nikkaji Web: J89.403F
CoE Number: 11882
XlogP3-AA: 2.50 (est)
Molecular Weight: 128.21472000
Formula: C8 H16 O
NMR Predictor: Predict (works with chrome or firefox)
EFSA/JECFA Comments: Mixture of stereoisomers (EFFA, 2010). cis (R,S) = (S,R) (50 %), trans (R,R) (25 %) and trans (S,S) (25 %) (EFFA, 2012b).
Category: flavoring 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
JECFA Food Flavoring: 1453  2,5-diethyltetrahydrofuran
Flavis Number: 13.095 (Old)
DG SANTE Food Flavourings: 13.095  2,5-diethyltetrahydrofuran
FEMA Number: 3743  2,5-diethyltetrahydrofuran
FDA Mainterm: 2,5-DIETHYLTETRAHYDROFURAN
FDA Regulation:
FDA PART 172 -- FOOD ADDITIVES PERMITTED FOR DIRECT ADDITION TO FOOD FOR HUMAN CONSUMPTION
Subpart F--Flavoring Agents and Related Substances
Sec. 172.515 Synthetic flavoring substances and adjuvants.
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Physical Properties:
Appearance: colorless clear liquid (est)
Assay: 97.00 to 100.00 % 
Food Chemicals Codex Listed: No
Specific Gravity: 0.82700 to 0.83300 @  25.00 °C.
Pounds per Gallon - (est).: 6.881 to  6.931
Refractive Index: 1.40100 to 1.40700 @  20.00 °C.
Boiling Point: 116.00 °C. @ 760.00 mm Hg
Vapor Pressure: 3.815000 mm/Hg @ 25.00 °C. (est)
Flash Point: 102.00 °F. TCC ( 38.89 °C. )
logP (o/w): 2.563 (est)
Soluble in:
 alcohol
 water, slightly
 water, 415.4 mg/L @ 25 °C (est)
Insoluble in:
 water
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Organoleptic Properties:
Odor Type: herbal
Odor Strength: medium ,
recommend smelling in a 0.10 % solution or less
 sweet  herbal  caramellic  
Odor Description:
at 0.10 % in propylene glycol. 
sweet herbal caramel
  
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Cosmetic Information:
None found
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Suppliers:
Axsyn
For experimental / research use only.
Furan,2,5-diethyltetrahydro-
BOC Sciences
For experimental / research use only.
2,5-Diethyloxolane
Parchem
2,5-diethyl tetrahydrofuran
Penn A Kem
2,5-Diethyltetrahydrofuran
Chemical Sources Association
Need This Item for Flavor/Food?: You can contact the Chemical Sources Association
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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
 
Pictogram
 
Hazard statement(s)
None found.
Precautionary statement(s)
None found.
Oral/Parenteral Toxicity:
oral-rat LD50  [sex: M,F] 3800 mg/kg
(Burdock & Ford, 1990j)

oral-rat LD50  [sex: M,F] 3754 mg/kg
(Reagan & Becci, 1984i)

oral-rat LD50  3400 mg/kg
SENSE ORGANS AND SPECIAL SENSES: LACRIMATION: EYE SKIN AND APPENDAGES (SKIN): HAIR: OTHER GASTROINTESTINAL: "HYPERMOTILITY, DIARRHEA"
Acute Toxicity Data. Journal of the American College of Toxicology, Part B. Vol. 1, Pg. 5, 1990.

Dermal Toxicity:
Not determined
Inhalation Toxicity:
Not determined
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Safety in Use Information:
Category: flavoring agents
Recommendation for 2,5-diethyl tetrahydrofuran usage levels up to:
 not for fragrance use.
 
Maximised Survey-derived Daily Intakes (MSDI-EU): 0.009 (μg/capita/day)
Maximised Survey-derived Daily Intakes (MSDI-USA): 0.09 (μg/capita/day)
Structure Class: II
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: 14
Click here to view publication 14
 average usual ppmaverage maximum ppm
baked goods: -10.00000
beverages(nonalcoholic): -5.00000
beverages(alcoholic): -5.00000
breakfast cereal: --
cheese: --
chewing gum: --
condiments / relishes: --
confectionery froastings: --
egg products: --
fats / oils: --
fish products: --
frozen dairy: -5.00000
fruit ices: --
gelatins / puddings: -5.00000
granulated sugar: --
gravies: --
hard candy: --
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: -10.00000
soups: --
sugar substitutes: --
sweet sauces: --
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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 33 (FGE.33)[1] - Six Tetrahydrofuran Derivatives from Chemical Groups 13, 14, 16 and 26 - Scientific Opinion of the Panel on Food Additives, Flavourings, Processing Aids and Materials in Contact with Food
View page or View pdf
Flavouring Group Evaluation 75 (FGE.75)[1] - Consideration of tetrahydrofuran derivatives and a furanone derivative evaluated by JECFA (63rd meeting) structurally related to tetrahydrofuran derivatives evaluated by EFSA in FGE.33 (2008)
View page or View pdf
Scientific Opinion on Flavouring Group Evaluation 75, Revision 1 (FGE.75Rev1): Consideration of tetrahydrofuran derivatives evaluated by JECFA (63rd meeting) structurally related to tetrahydrofuran derivatives evaluated by EFSA in FGE.33 (2008)
View page or View pdf
EPI System: View
EPA Substance Registry Services (TSCA): 41239-48-9
EPA ACToR: Toxicology Data
EPA Substance Registry Services (SRS): Registry
Laboratory Chemical Safety Summary : 62913
National Institute of Allergy and Infectious Diseases: Data
 2,5-diethyloxolane
Chemidplus: 0041239489
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References:
 2,5-diethyloxolane
NIST Chemistry WebBook: Search Inchi
Canada Domestic Sub. List: 41239-48-9
Pubchem (cid): 62913
Pubchem (sid): 135020219
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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
HMDB (The Human Metabolome Database): HMDB29574
FooDB: FDB000729
Export Tariff Code: 2932.19.0000
Typical G.C.
VCF-Online: VCF Volatile Compounds in Food
ChemSpider: View
EFSA Update of results on the monitoring of furan levels in food: Read Report
EFSA Previous report: Results on the monitoring of furan levels in food: Read Report
EFSA Report of the CONTAM Panel on provisional findings on furan in food: Read Report
Read: Under the conditions of intended use - New developments in the FEMA GRAS program and the safety assessment of flavor ingredients
Read: A GRAS assessment program for flavor ingredients
Read: Sensory testing for flavorings with modifying properties. Food Technology
Read: Criteria for the safety evaluation of flavoring substances
Read: A procedure for the safety evaluation of natural flavor complexes used as ingredients in food: essential oils
Read: FEMA Expert Panel: 30 Years of safety evaluation for the flavor industry
Read: Consumption ratio and food predominance of flavoring materials
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Potential Blenders and core components note
 
For Odor
buttery
buttery
 acetoinFL/FR
 caramel pentadioneFL/FR
 cycloteneFL/FR
 cyclotene hydrateFL/FR
alpha,alpha-dimethyl anisyl acetoneFL/FR
 ethyl 2-hydroxy-2-methyl butyrateFL/FR
 ethyl cyclopentenoloneFL/FR
 ethyl maltolFL/FR
5-ethyl-2,3,4,5-tetramethyl-2-cyclohexen-1-oneFL/FR
 fenugreek absoluteFL/FR
 geranyl crotonateFR
 immortelle absoluteFL/FR
 maltolFL/FR
 maltyl propionateFL/FR
 maple furanoneFL/FR
 menthone lactoneFL/FR
 mesitene lactoneFR
 rosefuranFL/FR
 shoyu furanoneFL/FR
 strawberry furanoneFL/FR
 toffee furanoneFL/FR
coumarinic
 tonka bean resinoidFR
ethereal
isovaleraldehyde propylene glycol acetalFL/FR
fatty
(R)-gamma-decalactoneFL/FR
musty
 strawberry furanone methyl etherFL/FR
sweet
 vanilla bean absolute (vanilla planifolia)FL/FR
 vanilla oleoresin baliFL/FR
 
For Flavor
 
No flavor group found for these
2-acetyl-3,4,5,6-tetrahydropyridineFL
 allyl 2-furoateFL
(R)-gamma-decalactoneFL/FR
alpha,alpha-dimethyl anisyl acetoneFL/FR
 ethyl 2-hydroxy-2-methyl butyrateFL/FR
5-ethyl-2,3,4,5-tetramethyl-2-cyclohexen-1-oneFL/FR
 menthone lactoneFL/FR
 rosefuranFL/FR
 toffee furanoneFL/FR
burnt
 furfuryl alcoholFL
caramellic
 caramel furanoneFL
 caramel pentadioneFL/FR
 cycloteneFL/FR
 cyclotene hydrateFL/FR
 ethyl maltolFL/FR
5-ethyl-3,4,5,6-tetramethyl cyclohexen-2-oneFL
 fenugreek absoluteFL/FR
 maltolFL/FR
 maltyl propionateFL/FR
 maple furanoneFL/FR
 shoyu furanoneFL/FR
 strawberry furanoneFL/FR
creamy
 acetoinFL/FR
fatty
(E,E)-2,4-undecadienalFL
2,4-undecadienalFL
fruity
2-pentanoyl furanFL
isovaleraldehyde propylene glycol acetalFL/FR
green
 immortelle absoluteFL/FR
jammy
 ethyl cyclopentenoloneFL/FR
musty
 strawberry furanone methyl etherFL/FR
smoky
dextro-xyloseFL
sweet
 caramel dioneFL
 vanilla bean absolute (vanilla planifolia)FL/FR
 vanilla oleoresin baliFL/FR
 
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Potential Uses:
 caramelFL
 mintFL
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Occurrence (nature, food, other): note
 caper
Search Trop  Picture
 melissa oil slovak republic @ 0.08%
Data  GC  Search Trop  Picture
 thymus capitatus
Search Trop  Picture
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Synonyms:
2,5-diethyl oxolane
2,5-diethyloxolane
2,5-diethyltetrahydrofuran
 furan, 2,5-diethyltetrahydro-
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