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General Material Information

Preferred name isoamyl alcohol
Trivial Name Isoamyl alcohol
Short Description 3-methylbutan-1-ol (isopentanol)
Formula C5 H12 O
CAS Number 123-51-3
FEMA Number 2057
Flavis Number 2.003
ECHA Number 204-633-5
FDA UNII DEM9NIT1J4
Nikkaji Number J2.011G
Beilstein Number 1718835
MDL MFCD00002934
COE Number 51
Bio Activity Summary External link
NMR Predictor External link
JECFA Food Flavoring 52 isoamyl alcohol
FDA Patent No longer provide for the use of these seven synthetic flavoring substances
FDA Mainterm 123-51-3 ; ISOAMYL ALCOHOL
Synonyms
  • 2-methyl-4-butanol
  • 3-methyl butan-1-ol
  • 3-methyl butanol
  • 3-methyl-1-butanol
  • 3-methylbutan-1-ol
  • iso amyl alcohol – technical grade
  • iso amyl alcohol (natural)
  • iso amyl alcohol FCC natural
  • iso amyl alcohol nat.
  • iso amyl alcohol natural
  • iso amyl alcohol natural 98% F&F grade
  • iso amyl alcohol P & F
  • iso amyl alcohol synthetic
  • iso amyl alcohol, natural 99% pharmacutical grade
  • iso butyl carbinol
  • iso pentanol
  • iso pentyl alcohol
  • nat.iso amyl alcohol
  • nat.L-3-methylbutanol
  • sec-butyl carbinol
  • sec-butylcarbinol
  • isopentanol
  • 1-Butanol, 3-methyl-
  • Isopentyl alcohol
  • Isoamylol
  • Isobutyl carbinol
  • iso-Amyl alcohol
  • iso-Pentanol
  • 3-Methylbutyl alcohol
  • NSC 1029
  • NSC 7905
  • 3-Methylbutane-1-ol

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

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Literature & References

3-methylbutan-1-ol
NIST Chemistry WebBook:Search Inchi
Canada Domestic Sub. List:123-51-3
Pubchem (cid):31260
Pubchem (sid):134974567
Flavornet:123-51-3
Pherobase:View
Publications by PubMed
Characterization of aroma compounds of Chinese famous liquors by gas chromatography-mass spectrometry and flash GC electronic-nose.
Debaryomyces hansenii strains differ in their production of flavor compounds in a cheese-surface model.
Tentative identification of volatile flavor compounds in commercial Budu, a Malaysian fish sauce, using GC-MS.
Classification of wines from five Spanish origin denominations by aromatic compound analysis.
Comparison of volatiles of cultured and wild sea bream (Sparus aurata) during storage in ice by dynamic headspace analysis/gas chromatography-mass spectrometry.
Odor-active headspace components in fermented red rice in the presence of a monascus species.
Flavor characterization of ripened cod roe by gas chromatography, sensory analysis, and electronic nose.
Detection of flavor compounds in longissimus muscle from four hybrid pig breeds of Sus scrofa, Bamei pig, and Large White.
Isolation and characterization of awamori yeast mutants with L-leucine accumulation that overproduce isoamyl alcohol.
Debaryomyces hansenii strains differ in their production of flavor compounds in a cheese-surface model.
Preparation of reminiscent aroma mixture of Japanese soy sauce.
Tentative identification of volatile flavor compounds in commercial Budu, a Malaysian fish sauce, using GC-MS.
Effects of indigenous yeasts on physicochemical and microbial properties of Korean soy sauce prepared by low-salt fermentation.
Characterization of aroma compounds of Chinese famous liquors by gas chromatography-mass spectrometry and flash GC electronic-nose.
Enzymatic synthesis of isoamyl butyrate catalyzed by immobilized lipase on poly-methacrylate particles: optimization, reusability and mass transfer studies.
Volatile organic compounds from a Tuber melanosporum fermentation system.
Headspace solid phase microextraction (SPME) analysis of flavor compounds in wines. Effect of the matrix volatile composition in the relative response factors in a wine model.
Improved production of isoamyl acetate by a sake yeast mutant resistant to an isoprenoid analog and its dependence on alcohol acetyltransferase activity, but not on isoamyl alcohol production.
Flavor characterization of ripened cod roe by gas chromatography, sensory analysis, and electronic nose.
Branched-chain 2-keto acid decarboxylases derived from Psychrobacter.
Flavor compounds of pine sprout tea and pine needle tea.
Molecular cloning of the isoamyl alcohol oxidase-encoding gene (mreA) from Aspergillus oryzae.
Enhanced production of isoamyl alcohol and isoamyl acetate by ubiquitination-deficient Saccharomyces cerevisiae mutants.
Classification of wines from five Spanish origin denominations by aromatic compound analysis.
Fast fractionation of complex organic extracts by normal-phase chromatography on a solid-phase extraction polymeric sorbent. Optimization of a method to fractionate wine flavor extracts.
Odor-active headspace components in fermented red rice in the presence of a monascus species.
Significance of volatile compounds produced by spoilage bacteria in vacuum-packed cold-smoked salmon (Salmo salar) analyzed by GC-MS and multivariate regression.
Comparison of volatiles of cultured and wild sea bream (Sparus aurata) during storage in ice by dynamic headspace analysis/gas chromatography-mass spectrometry.
Pyruvate decarboxylase catalyzes decarboxylation of branched-chain 2-oxo acids but is not essential for fusel alcohol production by Saccharomyces cerevisiae.
Effect of different strains of Saccharomyces cerevisiae on production of volatiles in Napa Gamay wine and Petite Sirah wine.
Aerobic production of isoamyl acetate by overexpression of the yeast alcohol acetyl-transferases AFT1 and AFT2 in Escherichia coli and using low-cost fermentation ingredients.
Applicability of CoA/acetyl-CoA manipulation system to enhance isoamyl acetate production in Escherichia coli.
Molecular breeding of the Mureka-non-forming sake koji mold from Aspergillus oryzae by the disruption of the mreA gene.
Functional characterization of enzymes forming volatile esters from strawberry and banana.
Physiological analysis of yeast cells by flow cytometry during serial-repitching of low-malt beer fermentation.

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):C07328
HMDB (The Human Metabolome Database):HMDB06007
FooDB:FDB008131
YMDB (Yeast Metabolome Database):YMDB00570
Export Tariff Code:2905.19.9090
Typical G.C.
VCF-Online:VCF Volatile Compounds in Food
ChemSpider:View
Wikipedia:View
Formulations/Preparations:
•major component of commercial amyl alcohol, fusel oil & potato-spirit oil. •grade: technical •fusel oil

PhysChem Properties

Material listed in food chemical codex No
Molecular weight 88.149841308594
Specific gravity @ 25 °C
Pounds per Gallon 6.715 to 67.65
Refractive Index 1.405 to 1.41 @ 20 °C
Melting Point -117 to -116°C @ 760 mm Hg
Boiling Point 131 to 133°C @ 760 mm Hg
Boiling Point 68 to 69°C @ 50 mm Hg
Vapor Pressure 2.37 mmHg @ 25 °C
Vapor Density 3
Flash Point TCC Value 45.56 °C TCC
logP (o/w) 1.16
Solubility
alcohol Yes
water, 2.67E+04 mg/L @ 25 °C (exp) Yes

Organoleptic Properties

Odor Type: Fermented
fusel, alcoholic, whiskey, fruity, banana, pungent, ethereal, cognac, molasses
Odor strength medium , recommend smelling in a 10.00 % solution or less
Substantivity 8 hour(s) at 100.00 %
General comment At 10.00 % in dipropylene glycol. fusel oil alcoholic whiskey fruity banana
Mosciano, Gerard P&F 22, No. 4, 75, (1997) Fusel, alcoholic, pungent, etherial, cognac, fruity, banana and molasses
VCF-online.nl Alcohol, balsamic, banana, cheese, cocoa, floral, fruit, fusel, malt, must, nail polish, pungent, rancid, roasted bread, yeast Quantity range in all products 0 — 19800 ppm (n=385)
Flavor Type: Fusel
fusel, fermented, fruity, banana, ethereal, cognac
Mosciano, Gerard P&F 22, No. 4, 75, (1997) At 50.00 ppm. Fusel, fermented, fruity, banana, etherial and cognac
General comment WINEY, COGNAC, BRANDY

Occurrences

Safety Information

Safety information

Preferred SDS: View
European information :
Most important hazard(s):
Xn - Harmful.
R 10 - Flammable.
R 20 - Harmful by inhalation.
R 37 - Irritating to respiratory system.
R 66 - Repeated exposure may cause skin dryness or cracking.
S 02 - Keep out of the reach of children.
S 16 - Keep away from sources of ignition - No Smoking.
S 23 - Do not breath vapour.
S 26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S 36/37/39 - Wear suitable clothing, gloves and eye/face protection.
S 46 - If swallowed, seek medical advice immediately and show this container or label.
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 1300 mg/kg
BLOOD: OTHER CHANGES KIDNEY, URETER, AND BLADDER: OTHER CHANGES LIVER: FATTY LIVER DEGERATION
South African Medical Journal. Vol. 43, Pg. 795, 1969.

oral-rabbit LD50 3438 mg/kg
LUNGS, THORAX, OR RESPIRATION: DYSPNEA CARDIAC: PULSE RATE SENSE ORGANS AND SPECIAL SENSES: CORNEAL DAMAGE: EYE
Industrial Medicine and Surgery. Vol. 41, Pg. 31, 1972.

intravenous-mouse LD50 234 mg/kg
Archives Internationales de Pharmacodynamie et de Therapie. Vol. 135, Pg. 330, 1962.

intravenous-cat LDLo 210 mg/kg
Food and Cosmetics Toxicology. Vol. 16, Pg. 785, 1978.

intraperitoneal-mouse LDLo 233 mg/kg
Food and Cosmetics Toxicology. Vol. 16, Pg. 785, 1978.

intravenous-rabbit LDLo 1570 mg/kg
BEHAVIORAL: ANTIPSYCHOTIC
Food and Cosmetics Toxicology. Vol. 16, Pg. 785, 1978.

intraperitoneal-rat LDLo 813 mg/kg
Naunyn-Schmiedeberg's Archiv fuer Experimentelle Pathologie und Pharmakologie. Vol. 132, Pg. 214, 1928.

Dermal Toxicity:
skin-rabbit LD50 3970 ul/kg
South African Medical Journal. Vol. 43, Pg. 795, 1969.

subcutaneous-mouse LDLo 7480 mg/kg
Food and Cosmetics Toxicology. Vol. 16, Pg. 785, 1978.

skin-rabbit LD50 3970 uL/kg
American Industrial Hygiene Association Journal. Vol. 30, Pg. 470, 1969.

Inhalation Toxicity:
inhalation-human TCLo 150 ppm
SENSE ORGANS AND SPECIAL SENSES: OTHER CHANGES: OLFACTION SENSE ORGANS AND SPECIAL SENSES: CONJUNCTIVE IRRITATION: EYE LUNGS, THORAX, OR RESPIRATION: OTHER CHANGES
Journal of Industrial Hygiene and Toxicology. Vol. 25, Pg. 282, 1943.

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 isoamyl alcohol usage levels up to:
0.8000 % in the fragrance concentrate.
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. Update in publication number(s): 29
Click here to view publication 3
average usual ppmaverage maximum ppm
baked goods: 17.0000027.00000
beverages(nonalcoholic): 4.0000017.00000
beverages(alcoholic): 500.000004500.00000
breakfast cereal: --
cheese: --
chewing gum: 594.00000594.00000
condiments / relishes: --
confectionery froastings: --
egg products: --
fats / oils: --
fish products: --
frozen dairy: 5.0000010.00000
fruit ices: --
gelatins / puddings: 12.0000046.00000
granulated sugar: --
gravies: --
hard candy: 158.00000168.00000
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: 8.0000014.00000
soups: --
sugar substitutes: --
sweet sauces: --

Safety references

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

Flavouring Group Evaluation 1, Revision 1 (FGE.01Rev 1): Branched-chain aliphatic saturated aldehydes, carboxylic acids and related esters of primary alcohols and branched-chain carboxylic acids from chemical groups 1 and 2 (Commission Regulation (EC) No 1565/2000 of 18 July 2000) - Scientific Opinion of the Panel on Food Additives, Flavourings, Processing Aids and Materials in contact with Food (AFC) on a request from the Commission
View page or View pdf

Flavouring Group Evaluation 3, Revision 1 (FGE.03Rev1): Acetals of branched- and straight-chain aliphatic saturated primary alcohols and branched- and straight-chain saturated or unsaturated aldehydes, an ester of a hemiacetal and an orthoester of formic acid, from chemical groups 1, 2 & 4 Commission Regulation (EC) No 1565/2000 of 18 July 2000) [1] - Scientific Opinion of the Scientific Panel on Food Additives, Flavourings, Processing Aids and Materials in contact with Food (AFC)on a request from the Commission
View page or View pdf

Flavouring Group Evaluation 5, Revision 1 (FGE.05Rev1):Esters of branched- and straight-chain aliphatic saturated primary alcohols and of one secondary alcohol, and branched- and straight-chain unsaturated carboxylic acids from chemical groups 1, 2, and 5 (Commission Regulation (EC) No 1565/2000 of 18 July 2000) [1] - Opinion of the Scientific Panel on Food Additives, Flavourings, Processing Aids and Materials in contact with Food (AFC)
View page or View pdf

Flavouring Group Evaluation 2, Revision 1 (FGE.02) : Branched- and straight-chain aliphatic saturated primary alcohols and related esters of primary alcohols and straight-chain carboxylic acids and one straight-chain aldehyde from chemical groups 1 and 2 (Commission Regulation (EC) No 1565/2000 of 18 July 2000) - Opinion of the Scientific Panel on Food Additives, Flavourings, Processing Aids and Materials in contact with Food (AFC)
View page or View pdf

Flavouring Group Evaluation 10, Revision 1 (FGE10 Rev1)[1] - Aliphatic primary and secondary saturated and unsaturated alcohols, aldehydes, acetals, carboxylic acids and esters containing an additional oxygenated functional group and lactones from chemical groups 9, 13 and 30 - Scientific Opinion of the Panel on Food Additives, Flavourings, Processing Aids and Materials in Contact with Food (AFC)
View page or View pdf

Flavouring Group Evaluation 5, Revision 2 (FGE.05Rev2): Branched- and straight-chain unsaturated carboxylic acids and esters of these with aliphatic saturated alcohols from chemical groups 1, 2, 3 and 5
View page or View pdf

EPI System: View
NIOSH International Chemical Safety Cards:search
NIOSH Pocket Guide:search
Chemical Carcinogenesis Research Information System:Search
AIDS Citations:Search
Cancer Citations:Search
Toxicology Citations:Search
EPA Substance Registry Services (TSCA):123-51-3
EPA ACToR:Toxicology Data
EPA Substance Registry Services (SRS):Registry
Laboratory Chemical Safety Summary :31260
National Institute of Allergy and Infectious Diseases:Data
WISER:UN 1105
WGK Germany:1
3-methylbutan-1-ol
Chemidplus:0000123513
EPA/NOAA CAMEO:hazardous materials
RTECS:123-51-3