4-HEXEN-3-ONE Chemical Properties

Melting point:

-71.05°C (estimate)

Boiling point:

135-137 °C (lit.)

Density 

0.858 g/mL at 25 °C (lit.)

refractive index 

n20/D 1.44(lit.)

FEMA 

3352 | 4-HEXENE-3-ONE

Flash point:

94 °F

storage temp. 

Sealed in dry,Room Temperature

Specific Gravity

0.855

Odor

at 1.00 % in propylene glycol. pungent ethereal spicy green tropical metallic

Odor Type

acidic

JECFA Number

1125

LogP

1.09

CAS DataBase Reference

2497-21-4

EPA Substance Registry System

4-Hexen-3-one (2497-21-4)

Safety Information

Hazard Codes 

Xn

Risk Statements 

10-22-36/37/38

Safety Statements 

16-26-36/37/39

RIDADR 

UN 1224 3/PG 3

WGK Germany 

3

RTECS 

MP8659900

TSCA 

Yes

HazardClass 

3

PackingGroup 

III

HS Code 

29141990

MSDS

• Language:English Provider:SigmaAldrich

4-HEXEN-3-ONE Usage And Synthesis

Description

May be synthesized by hydration of 4-hexen-2-yne aqueous H2S04/HgS04; by hydrogenation of 2-hexen-5-yn-4-one over PdCaC03 catalyst in methanol.

Chemical Properties

Clear colorless to yellow liquid

Chemical Properties

4-Hexene-3-one has a pungent, acrid, metallic, ethereal odor

Occurrence

Reported found in cooked chicken, beef and pork

Preparation

By hydration of 4-hexen-2-yne aqueous H2SO4-HgSO4; by hydrogenation of 2-hexen-5-yn-4-one over Pd-CaCO3 catalyst in methanol.

Definition

ChEBI: 4-hexen-3-one is an enone that is hex-2-ene in which the two methylene hydrogens at position 4 have been replaced by an oxo group. It has a role as a flavouring agent, a plant metabolite and a human metabolite.

Aroma threshold values

Aroma characteristics at 1.0%: pungent, horseradish and mustard with an ethyl vinyl ketone ethereal note, notes reminiscent of vinegar and rum.

Taste threshold values

Taste characteristics at 10 ppm: pungent mustard, pepper, horseradish, rum, roasted onion and slightly tropical nuances

General Description

4-Hexen-3-one is an unsaturated aldehyde that is reported to occur in strawberry fruit, essential oil of Ruta graveolens and Holigarna grahamii leaves. Due to its fruity fragrance, it is also used in the perfume industry.

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