ALPHA,P-DIMETHYLSTYRENE

CAS No.：1195-32-0

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This product is a chemical product/pharmaceutical intermediate. It is not a drug, an active pharmaceutical ingredient (API), or a pharmaceutical-grade material. It has not been granted a drug approval number or a Chemical Drug Substance Approval Notice, has not passed drug-related review and approval, and is not manufactured, tested, or released in accordance with pharmaceutical GMP.
This product is intended solely for non-clinical research, process development, quality studies, further chemical processing, or chemical synthesis. It must not be used in drug-product manufacturing, clinical trials, clinical diagnosis, or administration to humans or animals, or be sold, used as an input, submitted for regulatory filing, or released as an API or pharmaceutical material.
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ALPHA,P-DIMETHYLSTYRENE Basic information

Product Name:	ALPHA,P-DIMETHYLSTYRENE
Synonyms:	2-(p-Methylphenyl)propene;alpha,4-Dimethylstyrene;Benzene, 1-methyl-4-(1-methylethenyl)-;benzene,1-methyl-4-(1-methylethenyl)-;Dehydro-p-cymene;p,α-dimethylstyrene;p-cymenene;p-Isopropenyl toluene
CAS:	1195-32-0
MF:	C10H12
MW:	132.2
EINECS:	214-795-9
Product Categories:	Alphabetical Listings;C-D;Alcohol& Phenol& Ethers;Flavors and Fragrances
Mol File:	1195-32-0.mol

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
Fp	144 °F
storage temp.	2-8°C
solubility	Chloroform (Slightly), Methanol (Slightly)
form	Oil
color	Colourless
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

Hazard Codes	Xi
Risk Statements	36/37/38
Safety Statements	26-36-37/39
WGK Germany	2
TSCA	Yes
HS Code	29029090

MSDS Information

Provider	Language
SigmaAldrich	English

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
Preparation	By passing a stream of p-cymene and water vapors over activated aluminum oxide at 730°C.
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/ja9600486The Journal of Organic Chemistry, 44, p. 3157, 1979 DOI: 10.1021/jo01332a014Synthetic 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.

ALPHA,P-DIMETHYLSTYRENE Preparation Products And Raw materials

Raw materials

1,1'-(1,1,2,2-Tetramethyl-1,2-ethanediyl)bis(4-methylbenzene)-->1,3-Cyclohexadiene-1-carboxaldehyde, 4,6,6-trimethyl--->4-ISOPROPYLBENZONITRILE-->2-(4-Methylphenyl)propan-2-ol-->ISOPROPENYLMAGNESIUM BROMIDE-->Isopropenyl acetate-->(+)-Dipentene-->p-menthatriene,p-mentha-1,3,8-triene-->2,2,6-trimethyl-1-oxaspiro[2.5]oct-5-ene-->Benzene, 1-(1-chloro-1-methylethyl)-4-methyl--->4-ISOPROPYLBENZYL CHLORIDE-->p-Cymene

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