ChemicalBook > CAS DataBase List > 6,7-Dihydro-5-methyl-5(H)-cyclopentapyrazine

6,7-Dihydro-5-methyl-5(H)-cyclopentapyrazine

Product Name: 6,7-Dihydro-5-methyl-5(H)-cyclopentapyrazine
CAS No.: 23747-48-0
Chemical Name: 6,7-Dihydro-5-methyl-5(H)-cyclopentapyrazine
Synonyms: FEMA 3306;nutty pyrazine;FEMA NUMBER 3306;5-METHYL-6,7-DIHYDROC;MAPLE LACTONE PYRAZINE;LABOTEST-BB LT00441061;METHYL DIHYDROCYCLOPENTAPYRAZINE;5-Methyl-5H-cyclopenta[b]pyrazine;5-METHYL-2,3-CYCLOPENTENOPYRAZINE;5-METHYL-6,7-DIHYDROCYCLOPENTAPYRAZINE
CBNumber: CB3348743
Molecular Formula: C8H10N2
Formula Weight: 134.18
MOL File: 23747-48-0.mol

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6,7-Dihydro-5-methyl-5(H)-cyclopentapyrazine Property

Melting point:: 121-123 °C
Boiling point:: 96-99 °C20 mm Hg(lit.)
Density: 1.055 g/mL at 25 °C(lit.)
FEMA: 3306 | 5H-5-METHYL-6,7-DIHYDROCYCLOPENTA(B)PYRAZINE
refractive index: n20/D 1.527(lit.)
Flash point:: 174 °F
storage temp.: Inert atmosphere,Room Temperature
form: clear liquid
pka: 1.85±0.40(Predicted)
color: Colorless to Light yellow to Light orange
Odor: nutty, roasted odor
Odor Type: earthy
biological source: synthetic
Water Solubility: insoluble
JECFA Number: 781
InChIKey: YZEFQPIMXZVPKP-UHFFFAOYSA-N
LogP: 1.33
NIST Chemistry Reference: 5H-5-methyl-6,7-dihydrocyclopentapyrazine(23747-48-0)
EPA Substance Registry System: 5H-Cyclopentapyrazine, 6,7-dihydro-5-methyl- (23747-48-0)

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Safety

Hazard Codes: Xi
Risk Statements: 36/37/38
Safety Statements: 26-36/37/39
WGK Germany: 3
TSCA: Yes
HS Code: 29339900

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P271Use only outdoors or in a well-ventilated area.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

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N-Bromosuccinimide Price

Sigma-Aldrich

Product number: W330604
Product name: 5H-5-Methyl-6,7-dihydrocyclopenta[b]pyrazine
Purity: ≥97%, FG
Packaging: 1 unit
Price: $48.87
Updated: 2025/07/31

Sigma-Aldrich

Product number: W330604
Product name: 5H-5-Methyl-6,7-dihydrocyclopenta[b]pyrazine
Purity: ≥97%, FG
Packaging: 1 unit
Price: $48.87
Updated: 2025/07/31

Sigma-Aldrich

Product number: W330604
Product name: 5H-5-Methyl-6,7-dihydrocyclopenta[b]pyrazine
Purity: ≥97%, FG
Packaging: 100g
Price: $321
Updated: 2025/07/31

Sigma-Aldrich

Product number: W330604
Product name: 5H-5-Methyl-6,7-dihydrocyclopenta[b]pyrazine
Purity: ≥97%, FG
Packaging: 1kg
Price: $2080
Updated: 2025/07/31

Sigma-Aldrich

Product number: W330604
Product name: 5H-5-Methyl-6,7-dihydrocyclopenta[b]pyrazine
Purity: ≥97%, FG
Packaging: sample-k
Price: $54.6
Updated: 2024/03/01

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6,7-Dihydro-5-methyl-5(H)-cyclopentapyrazine Chemical Properties,Usage,Production

Description

5H-5-Methyl-6,7-dihydrocyclopenta(-b)pyrazine has an earthy, baked potato, peanut, roasted odor. It may be prepared from condensation of 2-hydroxy-3-methyl-2-cyclopentene-l-one and ethylene diamine; by condensing a cyclopentenolone with alkylenediamines, or alternatively, an aliphatic α-diketone with 1,2-diamino cyclopentane; the resulting product is dehydrogenated in the presence of palladium over activated charcoal or copper chromite.

Chemical Properties

5H-5-Methyl-6,7-dihydrocyclopenta(b)pyrazine has an earthy, peanut, roasted odor

Chemical Properties

clear yellow to yellow-orange to brown liquid

Occurrence

Reported found in peanuts, filberts, asparagus, potato wheat and rye bread, cooked beef, pork, pork liver, beer, cocoa, coffee, green tea, barley, filberts, almond, sesame seed, malt and wort

Uses

5-Methyl-6,7-dihydrocyclopentapyrazine can be used for drug storage packaging and antibacterial composition.

Definition

ChEBI: 6,7-Dihydro-5-methyl-5H-cyclopenta[b]pyrazine is a member of pyrazines.

Preparation

From condensation of 2-hydroxy-3-methyl-2-cyclopentene-1-one and ethylene diamine; by condensing a cyclopentenolone with alkylenediamines, or alternatively, and aliphatic α-diketone with 1,2-diamino cyclopentane; the resulting product is dehydrogenated in the presence of palladium over activated charcoal or copper chromite.

Aroma threshold values

Aroma characteristics at 1.0%: sweet, nutty, roasted, toasted, grainy, coffee and corn with savory, meaty nuances.

Taste threshold values

Taste characteristics at 15 ppm: nut skin, brown, roasted, oily with a cocoa and coffee nuance, musty, nutty, and grainy

General Description

5H-5-Methyl-6,7-dihydrocyclopenta[b]pyrazine is the major flavor compound of palm sugar. It is also found in coffee and cooked meat.

6,7-Dihydro-5-methyl-5(H)-cyclopentapyrazine Preparation Products And Raw materials

Raw materials

Preparation Products

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6,7-Dihydro-5-methyl-5(H)-cyclopentapyrazine Suppliers

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View Lastest Price from 6,7-Dihydro-5-methyl-5(H)-cyclopentapyrazine manufacturers

Jinan Ruitong Biotech Co., Ltd.

Product: 6,7-Dihydro-5-methyl-5(H)-cyclopentapyrazine 23747-48-0
Price: US $0.00-0.00/kg
Min. Order: 1kg
Purity: 99%
Supply Ability: 1
Release date: 2025-08-20

Shaanxi Dideu New Materials Co. Ltd

Product: 6,7-Dihydro-5-methyl-5(H)-cyclopentapyrazine 23747-48-0
Price: US $0.00-0.00/KG
Min. Order: 1KG
Purity: 98.0%
Supply Ability: 10000KGS
Release date: 2025-06-26

Henan Aochuang Chemical Co.,Ltd.

Product: 6,7-Dihydro-5-methyl-5(H)-cyclopentapyrazine 23747-48-0
Price: US $0.00-0.00/kg
Min. Order: 1kg
Purity: 98%
Supply Ability: 1Ton
Release date: 2022-09-20

23747-48-0, 6,7-Dihydro-5-methyl-5(H)-cyclopentapyrazineRelated Search:

METSULFURON METHYL Kresoxim-methyl Sulfachoropyrazine sodium Tetramethylpyrazine Glipizide Pyrazine Bensulfuron methyl Methylparaben Methyl acetate Methyl acrylate Pyrazinamide Thiophanate-methyl Methyl Methyl bromide Parathion-methyl 6,7-Dihydro-5-methyl-5(H)-cyclopentapyrazine TOSLAB 800869 AKOS BBS-00001901

5-METHYL-6,7-DIHYDROC

5-METHYL-6,7-DIHYDROCYCLOPENTAPYRAZINE

6,7-DIHYDRO-5-METHYL-5H-CYCLOPENTAPYRAZINE

5H-5-METHYL-6,7-DIHYDROCYCLOPENTA[B]PYRAZINE

5H-5-METHYL-6,7-DIHYDROCYCLOPENTAPYRAZINE

5H-Cyclopentapyrazine, 6,7-dihydro-5-methyl-

5-methyl-(5H)-6,7-dihydrocyclo- pentapyrazine

5-Methyl-5H-cyclopenta[b]pyrazine

5-Methyl-6,7-dihydro-(5H)-cyclopentapyrazine

6,7-dihydro-5-methyl-5h-cyclopentapyrazin

5H-5-METHYL-6 7-DIHYDROCYCLOPENTA(B)- &

dihydromethylcyclopentapyrazine,6,7-dihydro-5-methyl-5H-cyclopentapyrazine

5-METHYL-6,7-DIHYDROCYCLOPENTA(B)PYRAZINE

6,7-Dihydro-5-methyl-5h-cyclopenta 1,4-diazine

6,7-Dihydro-5-methyl-5H-cyclopenta[b]pyrazine

6,7-Dihydro-5-methylcyclopentapyrazine, 98%

(5S)-5-methyl-2,5,6,7-tetrahydro-1H-cyclopenta[b]pyrazin-1-ium

5H-5-Methyl-6,7-dihydrocylope ntapyrazine

6,7-Dihydro-5-methyl-5(H)-cyclopentapyrazine,98%

METHYL DIHYDROCYCLOPENTAPYRAZINE

MAPLE LACTONE PYRAZINE

FEMA 3306

FEMA NUMBER 3306

LABOTEST-BB LT00441061

5-METHYL-2,3-CYCLOPENTENOPYRAZINE

5-METHYL-6,7-DIHYDRO-5(H)-CYCLOPENTA(B)PYRAZINE

5H-5-Methyl-6,7-dihydrocyclopentapyrazine&gt

5-methyl-5H,6H,7H-cyclopenta[b]pyrazine

6,7-Dihydro-5-methyl-5(H)-cyclopentapyrazine ISO 9001：2015 REACH

nutty pyrazine

5h-5-Methyl-6,7-Dihydrocylopenta（b）pyrazine

5H-5-Methyl-6,7-dihydrocyclopenta[b]pyrazine

5H-5-Methyl-6,7-dihydrocyclopenta[1,2-b]pyrazine

23747-48-0

C8H10N2C8H10N2C8H10N2

Alphabetical Listings

Flavors and Fragrances

M-N