ALPHA,P-DIMETHYLSTYRENE Chemical Properties

Melting point:

−28 °C(lit.)

Boiling point:

186-189 °C(lit.)

Density 

0.904 g/mL at 25 °C(lit.)

refractive index 

n20/D 1.535(lit.)

FEMA 

3144 | P,ALPHA-DIMETHYLSTYRENE

Flash point:

144 °F

storage temp. 

2-8°C

solubility 

Chloroform (Slightly), Methanol (Slightly)

form 

Oil

color 

Colourless

Specific Gravity

0.85

Odor

at 0.10 % in dipropylene glycol. phenolic spicy styrene clove guaiacol

Odor Type

phenolic

Water Solubility 

Insoluble in water, soluble in alcohol, miscible with oils.

JECFA Number

1333

Stability:

Light Sensitive

LogP

3.71

CAS DataBase Reference

1195-32-0(CAS DataBase Reference)

NIST Chemistry Reference

4-CH3C6H4C(CH3)CH2(1195-32-0)

EPA Substance Registry System

p,.alpha.-Dimethylstyrene (1195-32-0)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-36-37/39

WGK Germany 

2

TSCA 

Yes

HS Code 

29029090

MSDS

• Language:English Provider:SigmaAldrich

ALPHA,P-DIMETHYLSTYRENE Usage And Synthesis

Chemical Properties

Clear colorless to light yellow liquid

Chemical Properties

p,α-Dimethyl styrene has a citrusy-lemon-like aroma.

Occurrence

Reported found in pepper, coffee, anise and parsley

Uses

α, p-dimethylstyrene has been suggested for use in perfume compositions, mainly as a component in certain artificial essential oils. In Lemon fragrances for industrial masking purposes it may introduce lift, power and freshness.

Preparation

By passing a stream of p-cymene and water vapors over activated aluminum oxide at 730°C.

Definition

ChEBI: P-Mentha-1,3,5,8-tetraene is a monocyclic hydrocarbon and a monoterpene.

Taste threshold values

Taste characteristics at 2.5 ppm: spicy, balsamic, musty, and eugenol/guiacol-like with a nutty nuance.

Synthesis Reference(s)

Journal of the American Chemical Society, 118, p. 3970, 1996 DOI: 10.1021/ja9600486
The Journal of Organic Chemistry, 44, p. 3157, 1979 DOI: 10.1021/jo01332a014
Synthetic Communications, 19, p. 3353, 1989 DOI: 10.1080/00397918908052740

General Description

p,α-Dimethylstyrene has been identified as one of the volatile flavor constituents in litchi, essential oils of distilled Mexican lime and parsley.

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