1,1-Dimethoxy-3,7-dimethylocta-2,6-diene Chemical Properties

Boiling point:

105-106 °C10 mm Hg(lit.)

Density 

0.89 g/mL at 25 °C(lit.)

vapor density 

6.8 (vs air)

vapor pressure 

9 mm Hg ( 102.7 °C)

refractive index 

n20/D 1.454(lit.)

FEMA 

2305 | CITRAL DIMETHYL ACETAL

Flash point:

180 °F

form 

clear liquid

color 

Colorless to Almost colorless

Odor

at 100.00 %. green floral citric lemon lime natural

Odor Type

citrus

Water Solubility 

Almost insoluble in water

JECFA Number

944

LogP

3.76

CAS DataBase Reference

7549-37-3(CAS DataBase Reference)

NIST Chemistry Reference

3,7-Dimethyl-2,6-octadienal, dimethyl acetal(7549-37-3)

EPA Substance Registry System

2,6-Octadiene, 1,1-dimethoxy-3,7-dimethyl- (7549-37-3)

Safety Information

Hazard Codes 

Xi

Risk Statements 

43

Safety Statements 

36/37

WGK Germany 

2

RTECS 

RG5330000

Hazard Note 

Irritant

HS Code 

2911.00.5000

Toxicity

Both the oral LD₅₀ value in rats and the dermal LD₅₀ value in rabbits exceeded 5 g/kg (Hart, 1971).

MSDS

• Language:English Provider:SigmaAldrich

1,1-Dimethoxy-3,7-dimethylocta-2,6-diene Usage And Synthesis

Description

Citral dimethyl acetal is a colorless liquid. Sp.Gr. 0.89. B.P. slightly lower than that of Citral. Almost insoluble in water, soluble in alcohol and oils.

Chemical Properties

Citral dimethyl acetal has a fresh, lemon-like odor. The commercial product consists of a mixture of cis- and trans-isomers.

Occurrence

Apparently has not been reported to occur in nature.

Uses

Citral dimethyl acetal is used in perfume compositions partly as a mild-green topnote in soap fragrances, and also as a topnote modifier in delicate floral fragrances, green-citrusy types, fresh notes, etc. Used in flavor compositions mainly in Citrus types and generally in fruit flavors to introduce a natural freshness similar to that of unripe fruit or green Lemon peel, Apple peel, etc.

Definition

ChEBI: A monoterpenoid that is the acetal obtained by formal condensation of citral with methanol.

Preparation

From citral and methyl alcohol in the presence of a catalyst, or by reacting citral with trimethyl orthoformate.

Taste threshold values

Taste characteristics at 10 ppm: green, citrus, lemon, grapefruit, lime with woody and terpy nuance.

1,1-Dimethoxy-3,7-dimethylocta-2,6-diene(7549-37-3)Related Product Information

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