ALPHA,P-DIMETHYLSTYRENE

CAS NO.：1195-32-0
Empirical Formula: C10H12
Molecular Weight: 132.2
MDL number: MFCD00036510
EINECS: 214-795-9
SAFETY DATA SHEET (SDS)
Update Date: 2026-05-28 04:34:41

What is ALPHA,P-DIMETHYLSTYRENE?

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

The Uses of ALPHA,P-DIMETHYLSTYRENE

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.

Properties of ALPHA,P-DIMETHYLSTYRENE

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
Water Solubility	Insoluble in water, soluble in alcohol, miscible with oils.
JECFA Number	1333
Stability:	Light Sensitive
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 for ALPHA,P-DIMETHYLSTYRENE

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.