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2-Phenyl-1-propene structure
Chemical Name:
AMS;alpha-methyl;alpha-Methylst;2-PHENYLPROPENE;à-methylstyrene;A-METHYL STYRENE;α-Menthylstyrene;2-phenyl-1-propen;2-Phenylpropylene;styrene,α-methyl-
Molecular Formula:
Formula Weight:
MOL File:

2-Phenyl-1-propene Properties

Melting point:
−24 °C(lit.)
Boiling point:
165-169 °C(lit.)
0.909 g/mL at 25 °C(lit.)
vapor density 
4.1 (vs air)
vapor pressure 
2.1 mm Hg ( 20 °C)
refractive index 
n20/D 1.539
Flash point:
114 °F
storage temp. 
Clear colorless
5-6 (500g/l, H2O)
explosive limit
Water Solubility 
CAS DataBase Reference
98-83-9(CAS DataBase Reference)
NIST Chemistry Reference
EPA Substance Registry System
Benzene, (1-methylethenyl)-(98-83-9)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
  • NFPA
Hazard Codes  Xi,N
Risk Statements  10-36/37-51/53
Safety Statements  61
RIDADR  UN 2303 3/PG 3
WGK Germany  2
RTECS  WL5075300
Autoignition Temperature 445 °C
HS Code  2902 90 00
HazardClass  3
PackingGroup  III
Hazardous Substances Data 98-83-9(Hazardous Substances Data)
Toxicity LD50 orally in Rabbit: 4900 mg/kg
Signal word: Warning
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H226 Flammable liquid and vapour Flammable liquids Category 3 Warning
H304 May be fatal if swallowed and enters airways Aspiration hazard Category 1 Danger
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
H351 Suspected of causing cancer Carcinogenicity Category 2 Warning P201, P202, P281, P308+P313, P405,P501
H371 May cause damage to organs Specific target organ toxicity, single exposure Category 2 Warning P260, P264, P270, P309+P311, P405,P501
H373 May cause damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 2 Warning P260, P314, P501
H401 Toxic to aquatic life Hazardous to the aquatic environment, acute hazard Category 2 P273, P501
H411 Toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 2
Precautionary statements:
P201 Obtain special instructions before use.
P202 Do not handle until all safety precautions have been read and understood.
P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P233 Keep container tightly closed.
P240 Ground/bond container and receiving equipment.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash hands thoroughly after handling.
P264 Wash skin thouroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P271 Use only outdoors or in a well-ventilated area.
P273 Avoid release to the environment.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P391 Collect spillage. Hazardous to the aquatic environment
P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P370+P378 In case of fire: Use … for extinction.
P405 Store locked up.
P403+P235 Store in a well-ventilated place. Keep cool.
P501 Dispose of contents/container to..…

NFPA 704

Diamond Hazard Value Description
1 1
Health   1 Exposure would cause irritation with only minor residual injury (e.g. acetone, sodium bromate, potassium chloride)
Flammability   2 Must be moderately heated or exposed to relatively high ambient temperature before ignition can occur and multiple finely divided suspended solids that do not require heating before ignition can occur. Flash point between 37.8 and 93.3 °C (100 and 200 °F). (e.g. diesel fuel, sulfur)
Instability   1 Normally stable, but can become unstable at elevated temperatures and pressures (e.g. propene)

(NFPA, 2010)

2-Phenyl-1-propene price More Price(11)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 69168 α-Methylstyrene monomer analytical standard 98-83-9 1ml $33.5 2018-11-13 Buy
Sigma-Aldrich M80903 α-Methylstyrene 99%, contains 15 ppm p-tert-butylcatechol as inhibitor 98-83-9 1l $42.5 2018-11-13 Buy
TCI Chemical M0429 alpha-Methylstyrene (stabilized with TBC) >99.0%(GC) 98-83-9 25mL $17 2018-11-22 Buy
TCI Chemical M0429 alpha-Methylstyrene (stabilized with TBC) >99.0%(GC) 98-83-9 500mL $21 2018-11-22 Buy
Alfa Aesar L03609 alpha-Methylstyrene, 99%, stab. with 10-20 ppm 4-tert-butylcatechol 98-83-9 100ml $24.3 2018-11-15 Buy

2-Phenyl-1-propene Chemical Properties,Uses,Production

Chemical Properties

clear colourless liquid

Chemical Properties

Methylstyrene is a colorless liquid with a characteristic odor.


Polymerization monomer, especially forpolyesters.

General Description

A colorless liquid. Insoluble in water and less dense than water. Flash point 115°F. May be mildly toxic by ingestion, inhalation and skin absorption. Vapors may be narcotic by inhalation. Used as a solvent and to make other chemicals.

Air & Water Reactions

Flammable. Oxidizes readily in air to form unstable peroxides that may explode spontaneously [Bretherick, 1979 p.151-154, 164]. Insoluble in water.

Reactivity Profile

2-Phenyl-1-propene is easily peroxidizable; the peroxide may initiate exothermic polymerization of the bulk material. Reacts violently with strong oxidizing agents [Handling Chemicals Safely, 1980 p. 866; Bretherick, 1979 p. 160].


Moderate fire risk. Explosive limits in air1.9–6.1%. Avoid inhalation and skin contact. Upperrespiratory tract irritant, kidney and female repro-ductive damage. Possible carcinogen.

Health Hazard

Inhalation causes irritation of respiratory tract, headache, dizziness, light-headedness, and breathlessness. Ingestion causes irritation of mouth and stomach. Contact with liquid irritates eyes. Prolonged skin contact can cause severe rashes, swelling, and blistering.

Safety Profile

Mildly toxic by inhalation. Human systemic effects by inhalation: irritant effects. A skin and eye irritant. Flammable when exposed to heat or flame; can react vigorously with oxidizing materials. When heated to decomposition it emits acrid smoke and irritating fumes.

Potential Exposure

Methylstyrene is used as additive, plasticizer, and copolymer; used in the production of modified polyester and alkyd resin formulations.

First aid

If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit


UN2303 Isopropenylbenzene, Hazard Class: 3; Labels: 3-Flammable liquid

Purification Methods

Wash the monomer three times with aqueous 10% NaOH (to remove inhibitors such as quinol), then six times with distilled water, dry with CaCl2 and distil it unde


Vapors may form explosive mixture with air. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides, peroxides, halogens, catalysts for vinyl or ionic polymers; aluminum, iron chloride; copper. Methylstyrene may form unstable peroxides; may polymerize. Usually contains an inhibitor, such as tert-butyl catechol.

Waste Disposal

ncineration, often by admixture with a more flammable solvent

2-Phenyl-1-propene Preparation Products And Raw materials

Raw materials

Preparation Products

2-Phenyl-1-propene Suppliers

Global( 144)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Tianjin Zhongxin Chemtech Co., Ltd.
022-66880086 CHINA 558 58
Henan DaKen Chemical CO.,LTD.
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Henan Tianfu Chemical Co.,Ltd.
0371-55170693 CHINA 20680 55
Mainchem Co., Ltd.
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Xiamen AmoyChem Co., Ltd
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Chemwill Asia Co.,Ltd.
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Hubei Jusheng Technology Co.,Ltd.
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Haihang Industry Co.,Ltd
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(323) 306-3136
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Tianjin Zhongxin Chemtech Co., Ltd. 86(0)22-66880623
86(0)22-66880086 China 552 60

2-Phenyl-1-propene Spectrum

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