5-METHYL-2-HEPTEN-4-ONE Chemical Properties

Melting point:

-66.9°C (estimate)

Boiling point:

170 °C(lit.)

Density 

0.845 g/mL at 25 °C(lit.)

refractive index 

n20/D 1.444(lit.)

FEMA 

3761 | 5-METHYL-2-HEPTEN-4-ONE

Flash point:

126 °F

Odor

at 1.00 % in dipropylene glycol. raw nut skin myrcene ketonic sweet hazelnut filbert

Odor Type

nutty

JECFA Number

1133

LogP

1.97

CAS DataBase Reference

81925-81-7(CAS DataBase Reference)

EPA Substance Registry System

2-Hepten-4-one, 5-methyl- (81925-81-7)

Safety Information

Risk Statements 

10

Safety Statements 

16

RIDADR 

UN 1993 3/PG 1

WGK Germany 

3

TSCA 

Yes

HazardClass 

3

PackingGroup 

III

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

5-METHYL-2-HEPTEN-4-ONE Usage And Synthesis

Description

5-Methyl-2-hepten-4-one has a hazelnut, metallic, buttery odor and a hazelnut, buttery, mushroom taste.

Chemical Properties

5-Methyl-2-hepten-4-one has a hazelnut, metallic, buttery odor and a hazelnut, buttery, mushroom taste.

Chemical Properties

(2E)-5-Methyl-2-hepten-4-one has a fruity, hazelnut, and green odor reminding of dried fruits and a characteristic, nutty, roasted, and nougat-like hazelnut flavor. It was identified as the character compound of natural hazelnut flavor. Preparation is possible, for example, by Grignard reaction of 2-butyl magnesium chloride with crotonaldehyde and subsequent oxidation or by reaction of 2-methylbutanoyl chloride with propene.
The material is used in fragrances as top-note booster in exotic fruit and citrus notes and in nut, cocoa, coffee, and so on, flavors.

Occurrence

Reported found in roasted hazelnuts and roasted filberts.

Aroma threshold values

Aroma characteristics at 1.0%: sweet roasted hazelnuts, rich nutty with a roasted nut skin.

Taste threshold values

Taste characteristics at 5 ppm: nutty, roasted, coffee, cocoa, brown with an earthy brown and meaty nuance, sugar fondant, delicate, hazelnut, with macadamia and pecan nuances

Trade name

Filbertone (Symrise).

5-METHYL-2-HEPTEN-4-ONE(81925-81-7)Related Product Information

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