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General Material Information

Preferred name isopropenyl pyrazine
Trivial Name Isopropenylpyrazine
Short Description 2-isopropenylpyrazine
Formula C7 H8 N2
CAS Number 38713-41-6
FEMA Number 3296
FDA UNII D901VJ3P4X
Nikkaji Number J101.078F
COE Number 11341
xLogP3-AA 1.20 (est)
NMR Predictor External link
JECFA Food Flavoring 2125 isopropenylpyrazine
FDA Patent No longer provide for the use of these seven synthetic flavoring substances
FDA Mainterm 38713-41-6 ; ISOPROPENYLPYRAZINE
Synonyms
  • caramel pyrazine
  • (1-methyl ethenyl) pyrazine
  • 2-1-methyl vinyl pyrazine
  • 2-alpha- methyl vinyl pyrazine
  • 2-(1-methyl vinyl) pyrazine
  • (1-methylethenyl)pyrazine
  • 2-(1-methylvinyl)pyrazine
  • 2-(a- methylvinyl)pyrazine
  • 2-1-methylvinylpyrazine
  • prazine, (1-methylethenyl)-
  • 2-( prop-1-en-2-yl)pyrazine
  • 2-prop-1-en-2-ylpyrazine
  • 2-iso propenyl pyrazine
  • 2-iso propenyl-1,4-diazine
  • 2-iso propenylpyrazine
  • iso propenylpyrazine
  • pyrazine, (1-methylethenyl)-
  • pyrazine, 1-methylvinyl-
  • pyrazine, 2-(1-methylethenyl)-
  • pyrazine, isopropenyl-
  • 2-prop-1-en-2-ylpyrazine
  • 2-(1-Methylethenyl)pyrazine
  • 2-Isopropenylpyrazine
  • (α-Methylvinyl)pyrazine
  • Isopropenylpyrazine
  • 2-(Prop-1-en-2-yl)pyrazine

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

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Literature & References

2-prop-1-en-2-ylpyrazine
NIST Chemistry WebBook:Search Inchi
Canada Domestic Sub. List:38713-41-6
Pubchem (cid):62897
Pubchem (sid):135020068
Pherobase:View
Publications by US Patents
3,952,024 - Furfurylthioacetone
Certain 2,5-dimethyl-3-thiopyrazines

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
HMDB (The Human Metabolome Database):HMDB37134
FooDB:FDB016129
VCF-Online:VCF Volatile Compounds in Food
ChemSpider:View

PhysChem Properties

Material listed in food chemical codex No
Molecular weight 120.15476226807
Specific gravity @ 20 °C
Pounds per Gallon 8.514 to 8.597
Specific gravity @ 25 °C
Pounds per Gallon 8.021 to 8.055
Refractive Index 1.48 to 1.486 @ 20 °C
Boiling Point 190 to 200°C @ 760 mm Hg
Vapor Pressure 1.685 mmHg @ 25 °C
Flash Point TCC Value 51.67 °C TCC
logP (o/w) 1.758 est
Solubility
alcohol Yes
water, 6522 mg/L @ 25 °C (est) Yes
water No

Organoleptic Properties

Odor Type: Caramellic
caramellic, chocolate, nutty, roasted
General comment At 0.10 % in dipropylene glycol. caramellic chocolate nutty roasted
Flavor Type: Burnt
burnt, coffee
General comment Burnt coffee

Occurrences

Potential Uses

Applications
Odor purposes Butterscotch, Maple, Peanut
Flavoring purposes Burnt, Butter rum, Chocolate cocoa

Safety Information

Safety information

European information :
Most important hazard(s):
Xi - Irritant
R 10 - Flammable.
R 36/37/38 - Irritating to eyes, respiratory system, and skin.
S 02 - Keep out of the reach of children.
S 16 - Keep away from sources of ignition - No Smoking.
S 24/25 - Avoid contact with skin and eyes.
S 26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S 37/39 - Wear suitable gloves and eye/face protection.
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:
Not determined
Dermal Toxicity:
Not determined
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
Recommendation for isopropenyl pyrazine usage levels up to:
0.0500 % in the fragrance concentrate.
Maximised Survey-derived Daily Intakes (MSDI-EU): 0.012 (μg/capita/day)
Modified Theoretical Added Maximum Daily Intake (mTAMDI): 400 (μg/person/day)
Threshold of Concern:540 (μg/person/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: 5
Click here to view publication 5
average usual ppmaverage maximum ppm
baked goods: --
beverages(nonalcoholic): -10.00000
beverages(alcoholic): --
breakfast cereal: -10.00000
cheese: --
chewing gum: --
condiments / relishes: --
confectionery froastings: --
egg products: --
fats / oils: --
fish products: --
frozen dairy: -10.00000
fruit ices: -10.00000
gelatins / puddings: -10.00000
granulated sugar: --
gravies: -10.00000
hard candy: -10.00000
imitation dairy: --
instant coffee / tea: --
jams / jellies: --
meat products: -10.00000
milk products: -10.00000
nut products: --
other grains: --
poultry: --
processed fruits: --
processed vegetables: --
reconstituted vegetables: --
seasonings / flavors: --
snack foods: --
soft candy: --
soups: -10.00000
sugar substitutes: --
sweet sauces: --
Food categories according to Commission Regulation EC No. 1565/2000 (EC, 2000) in FGE.06 (EFSA, 2002a). According to the Industry the "normal" use is defined as the average of reported usages and "maximum use" is defined as the 95th percentile of reported usages (EFSA, 2002i).
Note: mg/kg = 0.001/1000 = 0.000001 = 1/1000000 = ppm.
average usage mg/kgmaximum usage mg/kg
Dairy products, excluding products of category 02.0 (01.0): 0.400002.00000
Fats and oils, and fat emulsions (type water-in-oil) (02.0): 0.100000.50000
Edible ices, including sherbet and sorbet (03.0): 0.400002.00000
Processed fruit (04.1): 0.400002.00000
Processed vegetables (incl. mushrooms & fungi, roots & tubers, pulses and legumes), and nuts & seeds (04.2): --
Confectionery (05.0): 1.000005.00000
Chewing gum (05.3): --
Cereals and cereal products, incl. flours & starches from roots & tubers, pulses & legumes, excluding bakery (06.0): 0.200001.00000
Bakery wares (07.0): 2.0000010.00000
Meat and meat products, including poultry and game (08.0): 0.200001.00000
Fish and fish products, including molluscs, crustaceans and echinoderms (MCE) (09.0): 0.200001.00000
Eggs and egg products (10.0): --
Sweeteners, including honey (11.0): --
Salts, spices, soups, sauces, salads, protein products, etc. (12.0): 0.400000.50000
Foodstuffs intended for particular nutritional uses (13.0): 0.200001.00000
Non-alcoholic ("soft") beverages, excl. dairy products (14.1): 0.200001.00000
Alcoholic beverages, incl. alcohol-free and low-alcoholic counterparts (14.2): 1.000005.00000
Ready-to-eat savouries (15.0): 1.000005.00000
Composite foods (e.g. casseroles, meat pies, mincemeat) - foods that could not be placed in categories 01.0 - 15.0 (16.0): 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...

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

Flavouring Group Evaluation 17, Revision 1 (FGE.17Rev1): Pyrazine derivatives from chemical group 24 - Opinion of the Scientific Panel on Food Additives, Flavourings, Processing Aids and Materials in contact with Food (AFC) [1]
View page or View pdf

Scientific Opinion on Flavouring Group Evaluation 17, Revision 2 (FGE.17Rev2): Pyrazine derivatives from chemical group 24
View page or View pdf

Scientific Opinion on Flavouring Group Evaluation 50, Revision 1 (FGE.50Rev1): Consideration of pyrazine derivatives evaluated by JECFA (57th meeting) structurally related to pyrazine derivatives evaluated by EFSA in FGE.17Rev2 (2010)
View page or View pdf

Scientific Opinion on Flavouring Group Evaluation 17, Revision 3 (FGE.17Rev3): Pyrazine derivatives from chemical group 24
View page or View pdf

EPI System: View
AIDS Citations:Search
Cancer Citations:Search
Toxicology Citations:Search
EPA Substance Registry Services (TSCA):38713-41-6
EPA ACToR:Toxicology Data
EPA Substance Registry Services (SRS):Registry
Laboratory Chemical Safety Summary :62897
National Institute of Allergy and Infectious Diseases:Data
WISER:UN 1993
WGK Germany:3
2-prop-1-en-2-ylpyrazine
Chemidplus:0038713416