2-isobutyl-4,5-dimethyl oxazole
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IUPAC name :4,5-dimethyl-2-(2-methylpropyl)-1,3-oxazole
InChI :InChI=1/C9H15NO/c1-6(2)5-9-10-7(3)8(4)11-9/h6H,5H2,1-4H3
InChIKey :SNRVAFQIIFPYDR-UHFFFAOYAP
SMILES :CC1=C(OC(=N1)CC(C)C)C
cas number :26131-91-9
fema number :4397
jecfa number :1556
fl. number :13.195
molar refractivity :45.06 ± 0.3 cm3
parachor :384.2 ± 4.0 cm3
index of refraction :1.461 ± 0.02
surface tension :29.9 ± 3.0 dyne/cm
density :0.933 ± 0.06 g/cm3
polarizability :17.86 ± 0.5 10-24cm3
XlogP : 2.20
XlogP3-AA : 2.80
molecular weight : 153.2215000 (IUPAC)
formula :C9 H15 N O
NMR Predictor :Predict
 
 
export tariff code :unspecified
fda reg :unspecified

Suppliers :
Nanjing :2-isobutyl-4,5-dimethyl oxazole

organoleptics :
odor type :burnt
odor strength :high ,
recommend smelling in a 0.10 % solution or less
odor description :
at 0.10 % in propylene glycol.  
burnt roasted

properties :
appearence :pale yellow to yellow clear liquid
assay : 95.00 to 100.00 %   
Food Chemicals Codex Listed :No
specific gravity :0.91000 to 0.91600 @ 25.00 °C.
pounds per gallon - calc. : 7.572 to 7.622
refractive index :1.43900 to 1.44700 @ 20.00 °C.
boiling point : 227.00 °C. @ 760.00 mm Hg
flash point : 166.00  °F.  TCC  ( 74.44 °C. )
logP (o/w) : 2.50

safety :
Oral Toxicity(LD50) :
  Not determined
Dermal Toxicity(LD50) :
  Not determined
Inhalation Toxicity(LC50) :
  Not determined
 

safety in use :
Maximised Survey-derived Daily Intakes (MSDI-EU) :0.17 (μg/capita/day)
Maximised Survey-derived Daily Intakes (MSDI-USA) :0.20 (μg/capita/day)
Threshold of concern :540 (μg/person/day)
 
recommendation for 2-isobutyl-4,5-dimethyl oxazole usage levels up to :
 not for fragrance use.
 
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 on the "LIBRARY" link.
publication number : 23
 average usual ppmaverage maximum ppm
baked goods : 2.0000010.00000
beverages(nonalcoholic) : 0.200001.00000
beverages(alcoholic) : --
breakfast cereal : 0.200001.00000
cheese : 0.400002.00000
chewing gum : --
condiments / relishes : 0.200001.00000
confectionery froastings : 1.000005.00000
egg products : --
fats / oils : 0.200001.00000
fish products : 0.200001.00000
frozen dairy : 0.400002.00000
fruit ices : 0.400002.00000
gelatins / puddings : 1.000005.00000
granulated sugar : --
gravies : 1.000005.00000
hard candy : --
imitation dairy : 0.400002.00000
instant coffee / tea : --
jams / jellies : 1.000005.00000
meat products : 0.200001.00000
milk products : 0.400002.00000
nut products : --
other grains : 0.200001.00000
poultry : 0.200001.00000
processed fruits : 0.400002.00000
processed vegetables : --
reconstituted vegetables : --
seasonings / flavors : 0.200001.00000
snack foods : 0.200001.00000
soft candy : --
soups : 0.200001.00000
sugar substitutes : --
sweet sauces : 0.200001.00000

safety references :
European Food Safety Athority(efsa) :Flavor usage levels; Subacute, Subchronic, Chronic and Carcinogenicity Studies; Developmental / Reproductive Toxicity Studies; Genotoxicity Studies...
EPI System :view
 
 
 
 4,5-dimethyl-2-(2-methylpropyl)-1,3-oxazole
chemidplus :26131-91-9
EPA Substance Registry Services :26131-91-9

references :
 4,5-dimethyl-2-(2-methylpropyl)-1,3-oxazole
fl. number :13.195
jecfa number :1556
NIST Chemistry WebBook :26131919
pubchem :10390224

other :
VCF-Online: VCF Volatile Compounds in Food
synonyms :
2-isobutyl-4,5-dimethyloxazole
4,5-dimethyl-2-(2-methylpropyl)-1,3-oxazole
4,5-dimethyl-2-isobutyl oxazole
2-(2-methyl propyl)-4,5-dimethyl oxazole

soluble in :
 alcohol

insoluble in :
 water

(odor and/or flavor) blends with :
3-acetyl-2,5-dimethyl thiophene
2-acetyl-3-ethyl pyrazine
4-allyl-2,6-dimethoxyphenol
 benzyl methyl sulfide
2-butenoic acid
 cocoa hexenal
3,6-cocoa pyrazine
4,5-dimethyl-2-propyl oxazole
2,5-dimethyl-4-ethyl oxazole
5-ethyl-2-methyl pyridine
2-ethyl-3-methoxypyrazine
2-ethyl-6-methyl pyrazine
 furfuryl thioacetate
 green pea pyrazine
 hexyl mercaptan
3-mercapto-2-pentanone
 methional
2-methoxy-3-propyl pyrazine
 methyl 2-(methyl thio) acetate
2-(methyl thio) acetaldehyde
4-(methyl thio) butanol
dextro,laevo-3-(methyl thio) butanone
 nutty pyrazine
 potato butanone
 potato butyraldehyde
 propylene glycol acetone ketal

natural occurrence in :
potato fried potato



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