4-Methylstyrene Chemical Properties

Melting point:

-34 °C

Boiling point:

170-175 °C(lit.)

Density 

0.897 g/mL at 25 °C(lit.)

vapor pressure 

<1 mm Hg ( 20 °C)

refractive index 

n20/D 1.542(lit.)

Flash point:

114 °F

storage temp. 

Store at <= 20°C.

solubility 

0.089g/l

form 

Liquid

color 

Clear colorless to light yellow

explosive limit

1.1-5.2%(V)

Water Solubility 

Miscible with benzene. slightly miscible with water.

BRN 

1209317

LogP

3.44 at 25℃

CAS DataBase Reference

622-97-9(CAS DataBase Reference)

NIST Chemistry Reference

Benzene, 1-ethenyl-4-methyl-(622-97-9)

EPA Substance Registry System

p-Methyl styrene (622-97-9)

Safety Information

Hazard Codes 

Xn

Risk Statements 

10-36/37/38-65

Safety Statements 

26-36-62

RIDADR 

UN 2618 3/PG 3

WGK Germany 

3

RTECS 

WL5076000

Autoignition Temperature

959 °F

TSCA 

Yes

HazardClass 

3

PackingGroup 

III

HS Code 

29029050

Hazardous Substances Data

622-97-9(Hazardous Substances Data)

MSDS

• Language:English Provider:4-Vinyltoluene
• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS
• Language:English Provider:ALFA

4-Methylstyrene Usage And Synthesis

Chemical Properties

CLEAR COLOURLESS TO LIGHT YELLOW LIQUID

Uses

4-Methylstyrene is used as a monomer for polyesters and in plastics production. It is also used as an intermediate in paint and coating additives. Further, it is used with other vinyltoluene isomers (3-vinyltoluene) as monomers for the preparation of poly(vinyltoluene). In addition to this, it is employed as a bi- ligand in the preparation of cationic, two-coordinate triphenylphosphine-gold(I)-pi complexes. Further, it is involved in Heck coupling reactions with chlorobenzene.

Definition

ChEBI: 4-Methylstyrene is a member of styrenes.

General Description

A clear colorless liquid with an aromatic odor. Flash point 129°F. Usually shipped with an inhibitor such as tert-butyl catechol added May polymerize if contaminated or subjected to heat. If polymerization takes place inside a closed container, the container may rupture violently. Vapors irritate the mucous membranes. Less dense than water and insoluble in water. Hence floats on water. Density is 7.6 lb / gal. Used in making plastics, especially as a monomer for polyesters.

Air & Water Reactions

Flammable. Insoluble in water.

Reactivity Profile

4-Methylstyrene may react vigorously with strong oxidizing agents. May react exothermically with reducing agents to release hydrogen gas. In the presence of various catalysts (such as acids) or initiators, may undergo exothermic addition polymerization reactions. May undergo autoxidation upon exposure to the air to form peroxides. These peroxides and polyperoxides are usually extremely unstable and liable to detonation. The peroxidation of butadiene has been involved in several serious industrial accidents.

Health Hazard

Inhalation or contact with material may irritate or burn skin and eyes. Fire may produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control or dilution water may cause pollution.

Purification Methods

Purify it as the above styrenes and add a small amount of antioxidant if it is to be stored. It has UV in EtOH at max 285nm (log 3.07), and in EtOH + HCl 295nm (log 2.84) and 252nm (log 4.23). [Schwartzman & Carson J Am Chem Soc 78 322 1956, Joy & Orchin J Am Chem Soc 81 305 1959, Buck et al. J Chem Soc 23771949, Beilstein 5 IV 1369.]

4-Methylstyrene(622-97-9)Related Product Information

• Styrene
• 4-Chlorostyrene
• 4-(4-CHLORO-BENZYLOXY)-PHENYLAMINE
• Vinylbenzyl chloride
• CHLORODIMETHYLVINYLSILANE
• 4-Methoxystyrene
• POLY(ALPHA-METHYLSTYRENE)
• 4-Vinylbenzyl chloride
• 2-METHYLSTYRENE
• 2-Phenyl-1-propene
• Silicone rubber,methyl-vinyl
• 4-METHYL-BETA-STYRYLBORONIC ACID DIETHANOLAMINE ESTER
• (-)-2-[METHYLAMINO]-1-PHENYLPROPANE
• 4-hydrostyrene
• METHYLSTYRENE
• 1,4-BIS(2-METHYLSTYRYL)BENZENE
• 4-Methylcinnamic acid
• ALPHA-Methylstyrene-vinyl toluene copolymer,ALPHA-Methylstyrene-vinyl toluene copolymer,ALPHA-Methylstyrene-vinyl toluene copolymer