M80903

α-Methylstyrene

99%, contains 15 ppm p-tert-butylcatechol as inhibitor

• Synonym(s): 2-Phenylpropene, Isopropenylbenzene
• Linear Formula: C₆H₅C(CH₃)=CH₂
• CAS Number: 98-83-9
• Molecular Weight: 118.18
• Beilstein: 969405
• EC Number: 202-705-0
• MDL number: MFCD00008859
• UNSPSC Code: 12162002
• PubChem Substance ID: 24897221
• NACRES: NA.23

Properties

• vapor density: 4.1 (vs air)
• Quality Level: 200
• vapor pressure: 2.1 mmHg ( 20 °C)
• Assay: 99%
• form: liquid
• autoignition temp.: 1065 °F
• contains: 15 ppm p-tert-butylcatechol as inhibitor
• expl. lim.: 6.1 %
• refractive index: n20/D 1.538 (lit.)
• bp: 165-169 °C (lit.)
• mp: −24 °C (lit.)
• density: 0.909 g/mL at 25 °C (lit.)
• storage temp.: 2-8°C
• SMILES string: CC(=C)c1ccccc1
• InChI: 1S/C9H10/c1-8(2)9-6-4-3-5-7-9/h3-7H,1H2,2H3
• InChI key: XYLMUPLGERFSHI-UHFFFAOYSA-N

Description

General description

-Methylstyrene is an aromatic alkyl-substituted styrene monomer with a relatively high boiling point. It is widely used as a monomer to synthesize thermoplastic composite resins applied in adhesives, and coatings that require high-temperature stability. It can also participate as a precursor in regioselective and diastereoselective synthesis of natural products, pharmaceuticals, and other structurally diverse compounds.

Application

α-Methylstyrene can be used:

• As a monomer to prepare “Phene” monomer for photopolymerizable dental resin composites to reduce their polymerization shrinkage. α-Methylstyrene has a low double bond concentration suitable for the preparation of low volumetric shrinkage and shrinkage stress resilient resin composites.
• As a monomer to prepare poly(α-methylstyrene) polymer which can be used as an additive to fabricate organic thin film transistors. This polymer promotes the growth of uniformly aligned semiconductor crystals with significantly improved orientation.
• As a precursor to synthesize 3,4-dihydropyrans with therapeutic potential.

Safety Information

• Pictograms: GHS02,GHS08,GHS07,GHS09
• Signal Word: Danger
• Hazard Statements: H226,H304,H317,H319,H335,H361fd,H411
• Precautionary Statements: P210 - P273 - P280 - P301 + P310 - P303 + P361 + P353 - P331
• Hazard Classifications: Aquatic Chronic 2 - Asp. Tox. 1 - Eye Irrit. 2 - Flam. Liq. 3 - Repr. 2 - Skin Sens. 1B - STOT SE 3
• Target Organs: Respiratory system
• Storage Class Code: 3 - Flammable liquids
• WGK: WGK 2
• Flash Point(F): 114.8 °F - closed cup
• Flash Point(C): 46 °C - closed cup
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves