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General Material Information

Preferred name fish thiol
Trivial Name 2-Methyl-3-furanthiol
Short Description 2-methyl-3-furanthiol
Formula C5 H6 O S
CAS Number 28588-74-1
FEMA Number 3188
Flavis Number 13.055
ECHA Number 249-094-7
FDA UNII N21RW1N179
Nikkaji Number J75.521D
MDL MFCD00010280
COE Number 11678
xLogP3-AA 1.50 (est)
NMR Predictor External link
JECFA Food Flavoring 1060 2-methyl-3-furanthiol
FDA Patent No longer provide for the use of these seven synthetic flavoring substances
FDA Mainterm 28588-74-1 ; 2-METHYL-3-FURANTHIOL
Synonyms
  • oxy cyclothione (IFF)
  • oxy cyclothione-030 (IFF)
  • furan-3-thiol, 2-methyl-
  • 3-furanthiol, 2-methyl-
  • 2-methyl 3-furanthiol
  • 2-methyl furan-3-thiol
  • 2-methyl-3-furan thiol
  • 2-methyl-3-furanethiol
  • 2-methyl-3-furanthiol
  • 2-methyl-3-furanthiol 5% in ETOH
  • 2-methyl-3-furanthiol 5% in OS natural
  • 2-methyl-3-furanthiol 5% in sunflower oil natural
  • 2-methyl-3-furanthiol natural
  • 2-methyl-3-furanthiol, 0.1% in PG
  • 2-methyl-3-furyl mercaptan
  • 2-methyl-3-furylmercaptan
  • 2-methyl-3-furylthiol
  • 2 methyl-3-mercapto furan (2-methyl-3-furanthiol)
  • 2-methyl-3-mercapto-furan
  • 2-methyl-3-mercaptofuran
  • 2-methylfuran-3-thiol
  • 2-methylfuran-3-thiol
  • 3-Furanthiol, 2-methyl-
  • 2-Methyl-3-furanthiol
  • 2-Methyl-3-mercaptofuran
  • 2-Methyl-3-furylthiol
  • Oxycyclothione 030
  • 3-Mercapto-2-methylfuran

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

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Literature & References

2-methylfuran-3-thiol
NIST Chemistry WebBook:Search Inchi
Canada Domestic Sub. List:28588-74-1
Pubchem (cid):34286
Pubchem (sid):134997885
Flavornet:28588-74-1
Publications by US Patents
5,470,991 - Process for the manufacture of furan derivatives
Publications by PubMed
Relating sensory and chemical properties of sour cream to consumer acceptance.
Key aroma compounds in roasted in-shell peanuts.
Effect of addition of commercial rosemary extracts on potent odorants in cooked beef.
Metabolomic approach for determination of key volatile compounds related to beef flavor in glutathione-Maillard reaction products.
Synthesis and odor evaluation of five new sulfur-containing ester flavor compounds from 4-ethyloctanoic acid.
Selective preconcentration of volatile mercaptans in small SPE cartridges: quantitative determination of trace odor-active polyfunctional mercaptans in wine.
Identification of sulfur volatiles in canned orange juices lacking orange flavor.
Effect of cysteine and cystine addition on sensory profile and potent odorants of extruded potato snacks.
Key odor impact compounds in three yeast extract pastes.
Characterization of dried whey protein concentrate and isolate flavor.
Precursors of chicken flavor. II. Identification of key flavor precursors using sensory methods.
Characterization of the aroma of a meatlike process flavoring from soybean-based enzyme-hydrolyzed vegetable protein.
Effects of carnosine on volatile generation from Maillard reaction of ribose and cysteine.
2-Methyl-3-furanthiol and methional are possible off-flavors in stored orange juice: aroma-similarity, NIF/SNIF GC-O, and GC analyses.
Quantitative gas chromatography-olfactometry carried out at different dilutions of an extract. Key differences in the odor profiles of four high-quality Spanish aged red wines.
Stability of thiols in an aqueous process flavoring.
Aroma extract dilution analysis of a beeflike process flavor from extruded enzyme-hydrolyzed soybean protein.
Structured fluids as microreactors for flavor formation by the Maillard reaction.
Environmental and industrial factors relating to flavor tainting of fish in the upper Wisconsin river.
Toxicological properties of thio- and alkylphenols causing flavor tainting in fish from the upper Wisconsin River.
A method for quantitative analysis of flavor-tainting alkylphenols and aromatic thiols in fish.
Identification of the volatile compounds produced in sterile fish muscle (Sebastes melanops) by Pseudomonas fragi.
Identification and origin of odorous sulfur compounds in cooked ham.
Comparison of aroma active and sulfur volatiles in three fragrant rice cultivars using GC-olfactometry and GC-PFPD.
Effects of additional cysteine in fish diet on mercury concentration.
Key aroma compounds in roasted in-shell peanuts.
Formation of cysteine-S-conjugates in the Maillard reaction of cysteine and xylose.
Effect of addition of commercial rosemary extracts on potent odorants in cooked beef.
Participation of cathepsin L in modori phenomenon in carp (Cyprinus carpio) surimi gel.
Oxidative changes during ice storage of rainbow trout (Oncorhynchus mykiss) fed different ratios of marine and vegetable feed ingredients.
Transglutaminase cross-linking effect on sensory characteristics and antioxidant activities of Maillard reaction products from soybean protein hydrolysates.
A new strategy for improved glutathione production from Saccharomyces cerevisiae: use of cysteine- and glycine-rich chicken feather protein hydrolysate as a new cheap substrate.
Development of a monoclonal antibody against the left wing of ciguatoxin CTX1B: thiol strategy and detection using a sandwich ELISA.
Reduction of mercury from mackerel fillet using combined solution of cysteine, EDTA, and sodium chloride.
Effects of thermal processing and various chemical substances on formaldehyde and dimethylamine formation in squid Dosidicus gigas.
Thermal denaturation of tilapia myosin and its subunits as affected by constantly increasing temperature.
Garlic-derived S-allylmercaptocysteine is a hepato-protective agent in non-alcoholic fatty liver disease in vivo animal model.
Visual detection of organophosphorus pesticides represented by mathamidophos using Au nanoparticles as colorimetric probe.
Metabolomic approach for determination of key volatile compounds related to beef flavor in glutathione-Maillard reaction products.
Assessment of the aroma impact of major odor-active thiols in pan-roasted white sesame seeds by calculation of odor activity values.
Effects of lard on the formation of volatiles from the Maillard reaction of cysteine with xylose.
Gelation properties of spent duck meat surimi-like material produced using acid-alkaline solubilization methods.
Recent patents on the use of antioxidant agents in food.
Comparative study on the stability of fish actomyosin and pork actomyosin.
The chemical nature of mercury in human brain following poisoning or environmental exposure.
Determination of dithiocarbamates and milneb residues in foods by gas chromatography-mass spectrometry.
Value-added use of mushroom ergothioneine as a colour stabilizer in processed fish meats.
Effect of various types of egg white on characteristics and gelation of fish myofibrillar proteins.
Methylmercury-induced neurotoxicity and apoptosis.
Comparative study of washing treatments and alkali extraction on gelation characteristics of striped catfish (Pangasius hypophthalmus) muscle protein.
The effect of arsenic exposure and the efficacy of DMSA on the proteins and lipids of the gill tissues of Labeo rohita.
Antioxidative activities of mushroom (Flammulina velutipes) extract added to bigeye tuna meat: dose-dependent efficacy and comparison with other biological antioxidants.
Quantification and odor contribution of 2-furanmethanethiol in different types of fermented soybean paste miso.
Off-flavors removal and storage improvement of mackerel viscera by supercritical carbon dioxide extraction.
Toxicant exposure and mental health--individual, social, and public health considerations.
Urine mercury excretion following meso-dimercaptosuccinic acid challenge in fish eaters.
Antioxidative activity and antidiscoloration efficacy of ergothioneine in mushroom (Flammulina velutipes) extract added to beef and fish meats.
Determination and isolation of a thioesterase from passion fruit (Passiflora edulis Sims) that hydrolyzes volatile thioesters.
Morphological changes due to Lead exposure and the influence of DMSA on the gill tissues of the freshwater fish, Catla catla.
Characterization of odor-active compounds in extracts obtained by simultaneous extraction/distillation from moroccan black olives.
Effect of cysteine and cystine addition on sensory profile and potent odorants of extruded potato snacks.
Homogenization conditions affect the oxidative stability of fish oil enriched milk emulsions: oxidation linked to changes in protein composition at the oil-water interface.
A new vapor generation system for mercury species based on the UV irradiation of mercaptoethanol used in the determination of total and methyl mercury in environmental and biological samples by atomic fluorescence spectrometry.
Effect of pH on the Maillard reaction of [13C5]xylose, cysteine, and thiamin.
Key odor impact compounds in three yeast extract pastes.
Aroma extraction dilution analysis of Sauternes wines. Key role of polyfunctional thiols.
Occurrence of polyfunctional thiols in fresh lager beers.
Beneficial effects of ascorbic acid on heat-induced fish gel (Kamaboko) from the superoxide anion radical.
A novel method for quantification of 2-methyl-3-furanthiol and 2-furanmethanethiol in wines made from Vitis vinifera grape varieties.
Precursors of chicken flavor. II. Identification of key flavor precursors using sensory methods.
Characterization of the aroma of a wine from maccabeo. Key role played by compounds with low odor activity values.
Efficacy of animal anti-fertility compounds against sea lamprey (Petromyzon marinus) spermatozoa.
Alpha-mercaptoketone formation during the maillard reaction of cysteine and [1-(13)C]ribose.
More on mercury content in fish.
More on mercury content in fish.
Cysteamine-a somatostatin-inhibiting agent-induced growth hormone secretion and growth acceleration in juvenile grass carp (Ctenopharyngodon idellus).
FT-Raman spectroscopic investigation of lens proteins of tilapia treated with dietary vitamin E.
Changes in conformation and subunit assembly of cod myosin at low and high pH and after subsequent refolding.
Studies on the metabolism of the thiofurans furfuryl mercaptan and 2-methyl-3-furanthiol in rat liver.
Odorants in breast milk.
The chemical form of mercury in fish.
Neurotoxicity of organomercurial compounds.
GC-olfactometric characterization of aroma volatiles from the thermal degradation of thiamin in model orange juice.
Formation of aroma compounds from ribose and cysteine during the Maillard reaction.
Gas chromatographic-olfactometric characterization of aroma compounds in two types of cashew apple nectar.
Mercury toxicity and antioxidants: Part 1: role of glutathione and alpha-lipoic acid in the treatment of mercury toxicity.
Lipase-assisted generation of 2-methyl-3-furanthiol and 2-furfurylthiol from thioacetates.
Effects of carnosine on volatile generation from Maillard reaction of ribose and cysteine.
Characterization of the most odor-active compounds of Iberian ham headspace.
Chemical interactions between odor-active thiols and melanoidins involved in the aroma staling of coffee beverages.
Quantitative gas chromatography-olfactometry carried out at different dilutions of an extract. Key differences in the odor profiles of four high-quality Spanish aged red wines.
Stability of thiols in an aqueous process flavoring.
Partial purification of polyphenol oxidase from Chinese cabbage Brassica rapa L.
Aroma extract dilution analysis of a beeflike process flavor from extruded enzyme-hydrolyzed soybean protein.
Quantitative Model Studies on the Effectiveness of Different Precursor Systems in the Formation of the Intense Food Odorants 2-Furfurylthiol and 2-Methyl-3-furanthiol.
Structured fluids as microreactors for flavor formation by the Maillard reaction.
Olfactory discrimination of amino acids in brown bullhead catfish.
Production of monoclonal antibodies to Listeria monocytogenes and their application to determine the virulence of isolates from channel catfish.
Thietanium ion formation from the food mutagen 2-chloro-4-(methylthio)butanoic acid.
Purification and characterization of cathepsin L-like enzyme from the muscle of anchovy, Engraulis japonica.
Gastric carcinogenesis: 2-chloro-4-methylthiobutanoic acid, a novel mutagen in salted, pickled Sanma hiraki fish, or similarly treated methionine.
Increased susceptibility of liver to lipid peroxidation after ingestion of a high fish oil diet.
Excitotoxins in foods.
Interactive effects of selenium, methionine, and dietary protein on survival, growth, and physiology in mallard ducklings.
Interactive effects of arsenate, selenium, and dietary protein on survival, growth, and physiology in mallard ducklings.
Environmental and industrial factors relating to flavor tainting of fish in the upper Wisconsin river.
A method for quantitative analysis of flavor-tainting alkylphenols and aromatic thiols in fish.
Sensitive enzyme immunoassay of colistin and its application to detect residual colistin in rainbow trout tissue.
Effects of metals and organic compounds on hepatic glutathione, cysteine, and acid-soluble thiol levels in mullet (Mugil cephalus L.).
Effect of cysteine on iron absorption in man.
Protein changes in frozen fish.
Estimation of available methionine and cysteine in proteins of food products by in vivo and in vitro methods.
Mercury and mercurials.
Quantitative determination of the content of available methionine and cysteine in food proteins.
Identification of the volatile compounds produced in sterile fish muscle (Sebastes melanops) by Pseudomonas fragi.
Oxidation of methionine and cystine in foods treated with hydrogen peroxide.
Reduction of mercury with cysteine in comminuted halibut and hake fish protein concentrate.
Elimination of mercury from fish.
Volatile compounds produced in sterile fish muscle (Sebastes melanops) by Pseudomonas perolens.
Characterization of a major allergen (cod). Observations on effect of denaturation on the allergenic activity.
Symposium on microbial changes in foods. Bacteria active in the spoilage of certain sea foods.
Effect of amino acids on iron absorption from a staple vegetable food.
Determination of methylmercury salts in various kinds of biological material.

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
CHEMBL:View
HMDB (The Human Metabolome Database):HMDB36611
FooDB:FDB015527
YMDB (Yeast Metabolome Database):YMDB01443
Export Tariff Code:2932.19.5100
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

PhysChem Properties

Material listed in food chemical codex No
Molecular weight 114.16702270508
Specific gravity @ 25 °C
Pounds per Gallon 9.494 to 9.569
Refractive Index 1.509 to 1.53 @ 20 °C
Boiling Point 57 to 60°C @ 44 mm Hg
Vapor Pressure 5.782 mmHg @ 25 °C
Vapor Density 3.9
Flash Point TCC Value 36.67 °C TCC
logP (o/w) 1.941 est
Shelf life 6 months (or longer if stored properly.)
Storage notes Store in cool, dry place in tightly sealed containers, protected from heat and light. store under nitrogen.
Solubility
alcohol Yes
water, 630.8 mg/L @ 25 °C (est) Yes
water No

Organoleptic Properties

Odor Type: Sulfurous
sulfurous, meaty, fishy, metallic, chicken roasted chicken
General comment At 0.10 % in propylene glycol. sulfury meaty fish metallic
Mosciano, Gerard P&F 21, No. 3, 51, (1996) SuIfureous, meaty, fishy, metallic and roasted chicken-like
Flavor Type: Sulfurous
sulfurous, fishy, meaty, salmon, tuna, roasted
Mosciano, Gerard P&F 21, No. 3, 51, (1996) At 15.00 ppm. Sulfureous, fishy, meaty, salmon and tuna-like with a slight, roasted nuance
General comment Sulfury fish meat salmon tuna roasted
Considered to be an important flavour chemical for meat flavours; also used in nut flavors. van den Ouweland, Demole & Enggist (1989) have noted that a 5- or 6- membered planar ring substituted with an "ene-thiol" and a methyl group adjacent to the thiol is important for the generation of meaty flavour/aroma. Normal use levels in finished consumer product: 0.005-0.25ppm. Roasted meat; sweet beef broth, HVP notes

Occurrences

Potential Uses

Applications
Flavoring purposes Chicken, Fish, Meat, Salmon, Savory, Tuna
Cosmetic purposes Perfuming agents

Safety Information

Safety information

Preferred SDS: View
European information :
Most important hazard(s):
T - Toxic.
R 10 - Flammable.
R 25 - Toxic if swallowed.
S 01/02 - Keep locked up and out of the reach of children.
S 16 - Keep away from sources of ignition - No Smoking.
S 23 - Do not breath vapour.
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 36/37/39 - Wear suitable clothing, gloves and eye/face protection.
S 45 - In case of accident or if you feel unwell seek medical advice immediately.
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:
gavage-mouse LD50 [sex: M,F] 100 mg/kg
(Oser, 1969a)

gavage-mouse LD50 [sex: M,F] 100 mg/kg
(Moran et al., 1980)

oral-mouse LD50 100 mg/kg
Drug and Chemical Toxicology. Vol. 3, Pg. 249, 1980.

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 fish thiol usage levels up to:
0.0100 % in the fragrance concentrate.
Maximised Survey-derived Daily Intakes (MSDI-EU): 0.52 (μg/capita/day)
Maximised Survey-derived Daily Intakes (MSDI-USA): 0.90 (μg/capita/day)
NOEL (No Observed Effect Level): 5.00 (mg/kg bw per 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: 4
Click here to view publication 4
average usual ppmaverage maximum ppm
baked goods: -0.25000
beverages(nonalcoholic): --
beverages(alcoholic): --
breakfast cereal: --
cheese: --
chewing gum: --
condiments / relishes: -0.25000
confectionery froastings: --
egg products: --
fats / oils: --
fish products: --
frozen dairy: --
fruit ices: --
gelatins / puddings: --
granulated sugar: --
gravies: -0.25000
hard candy: --
imitation dairy: --
instant coffee / tea: --
jams / jellies: --
meat products: -0.25000
milk products: --
nut products: --
other grains: --
poultry: --
processed fruits: --
processed vegetables: --
reconstituted vegetables: --
seasonings / flavors: --
snack foods: --
soft candy: --
soups: -0.25000
sugar substitutes: --
sweet sauces: --

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):

Opinion of the Scientific Panel on food additives, flavourings, processing aids and materials in contact with food (AFC) related to Flavouring Group Evaluation 13 (FGE.13); Furfuryl and furan derivatives with and without additional side-chain substituents and heteroatoms from chemical group 14 (Commission Regulation (EC) No 1565/2000 of 18
View page or View pdf

Scientific Opinion on Flavouring Group Evaluation 13Rev1: Furfuryl and furan derivatives with and without additional side-chain substituents and heteroatoms from chemical group 14
View page or View pdf

Consideration of sulfur-substituted furan derivatives used as flavouring agents evaluated by JECFA (59th meeting) structurally related to a subgroup of substances within the group of “Furfuryl and furan derivatives with and without additional side-chain substituents and heteroatoms from chemical group 14” evaluated by EFSA in FGE.13Rev1 (2009)
View page or View pdf

Flavouring Group Evaluation 67 (FGE.67): Consideration of 40 furan-substituted aliphatic hydrocarbons, alcohols, aldehydes, ketones, carboxylic acids and related esters, sulfides, disulfides and ethers evaluated by JECFA at the 65th meeting (JECFA, 2006b) and re-evaluated at the 69th meeting (JECFA, 2009c)
View page or View pdf

Scientific Opinion on Flavouring Group Evaluation 13, Revision 2 (FGE.13Rev2): Furfuryl and furan derivatives with and without additional side-chain substituents and heteroatoms from chemical group 14
View page or View pdf

Scientific Opinion on Flavouring Group Evaluation 67, Revision 1 (FGE.67Rev.1): Consideration of 40 furan-substituted aliphatic hydrocarbons, alcohols, aldehydes, ketones, carboxylic acids and related esters, sulfides, disulfides and ethers evaluated by JECFA at the 65th meeting (JECFA, 2006b) and re-evaluated at the 69th meeting (JECFA, 2009c)
View page or View pdf

Scientific Opinion on Flavouring Group Evaluation 65, Revision 1 (FGE.65Rev1): Consideration of sulfur-substituted furan derivatives used as flavouring agents evaluated by JECFA (59th meeting) structurally related to a subgroup of substances within the group of ‘Furfuryl and furan derivatives with and without additional side-chain substituents and heteroatoms from chemical group 14’ evaluated by EFSA in FGE.13Rev2 (2011)
View page or View pdf

Safety and efficacy of furfuryl and furan derivatives belonging to chemical group 14 when used as flavourings for all animal species and categories
View page or View pdf

Scientific Opinion on Flavouring Group Evaluation 13 Revision 3 (FGE.13Rev3): furfuryl and furan derivatives with and without additional side-chain substituents and heteroatoms from chemical group 14
View page or View pdf

EPI System: View
EPA Substance Registry Services (TSCA):28588-74-1
EPA ACToR:Toxicology Data
EPA Substance Registry Services (SRS):Registry
Laboratory Chemical Safety Summary :34286
National Institute of Allergy and Infectious Diseases:Data
WISER:UN 1228
WGK Germany:3
2-methylfuran-3-thiol
Chemidplus:0028588741
RTECS:LU6235000 for cas# 28588-74-1