2,6-Dimethyl-5-Heptenal

Product Name:

2,6-Dimethyl-5-heptenal

Synonyms:

,6-Dimethyl hept-5-en-1-al;2,6-dimethyl-5-heptena;2,6-dimethylhept-;2,6-dimethylhept-5-en-1-al;2,6-dimethylhept-5-enal;ai3-33278;2,6-Dimethyl-5-heptenalstabilized;2,6-Dimethyl-2-hepten-7-al

CAS:

106-72-9

MF:

C9H16O

MW:

140.22

EINECS:

203-427-2

Mol File:

106-72-9.mol

Boiling point 

116-124 °C100 mm Hg(lit.)

density 

0.879 g/mL at 25 °C

FEMA 

2389 | 2,6-DIMETHYL-5-HEPTENAL

refractive index 

n20/D 1.444(lit.)

Fp 

141 °F

form 

Liquid

Specific Gravity

0.879

Water Solubility 

Soluble in alcohol, paraffin oil. Insoluble in water.

Sensitive 

Air Sensitive

JECFA Number

349

InChIKey

YGFGZTXGYTUXBA-UHFFFAOYSA-N

CAS DataBase Reference

106-72-9(CAS DataBase Reference)

NIST Chemistry Reference

5-Heptenal, 2,6-dimethyl-(106-72-9)

EPA Substance Registry System

5-Heptenal, 2,6-dimethyl- (106-72-9)

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-36/37/39

RIDADR 

1987

WGK Germany 

2

RTECS 

MJ8797000

Hazard Note 

Irritant

TSCA 

Yes

HazardClass 

3

PackingGroup 

III

HS Code 

29121900

Chemical Properties

2,6-Dimethyl-5-hepten-1-al was identified in ginger. It is a yellow liquid with a powerful, green, cucumber-like, and melon odor. It can be prepared by Darzens reaction of 6-methyl-5-hepten-2-one with ethyl chloroacetate. The intermediate glycidate is saponified and decarboxylated to yield the title compound.
It is used in many fragrance types and is invaluable in the creation ofmelon and cucumber notes.

Chemical Properties

2,6-Dimethyl-5-heptenal has a characteristic odor of melon and a corresponding taste.

Aroma threshold values

Detection: 16 ppb

Taste threshold values

Taste characteristics at 50 ppm: green, melon, watermelon-rind, cucumber, with a waxy, chemical and floral nuance.

Trade name

Melonal (Givaudan), Melomor (Aromor).

Safety Profile

skin and eye irritant. When heated to decomposition it emits acrid smoke and irritating fumes.

Raw materials

Isobutyraldehyde-->Crotonaldehyde