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Merck
CN

M80903

α-Methylstyrene

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

Synonym(s):

2-Phenylpropene, Isopropenylbenzene

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About This Item

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

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Product Name

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

InChI key

XYLMUPLGERFSHI-UHFFFAOYSA-N

InChI

1S/C9H10/c1-8(2)9-6-4-3-5-7-9/h3-7H,1H2,2H3

SMILES string

CC(=C)c1ccccc1

vapor density

4.1 (vs air)

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

Quality Level

200

Related Categories

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.

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.

signalword

Danger

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

3 - Flammable liquids

wgk

WGK 2

flash_point_f

114.8 °F - closed cup

flash_point_c

46 °C - closed cup

ppe

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter

Regulatory Information

危险化学品
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Certificates of Analysis (COA)

Lot/Batch Number
MKCZ4785
MKCX7213
MKCW5165
MKCV8149
MKCW0005

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Ting Luo et al.
iScience, 23(11), 101717-101717 (2020-11-17)
Resin embedding is widely used to dissect the fine structure of bio-tissue with electron and optical microscopy. However, it is difficult to embed large-volume tissues with resin. Here, we modified the formula of LR-White resin to prevent the sample cracking
Poly alpha-methylstyrene) polymer and small-molecule semiconductor blend with reduced crystal misorientation for organic thin film transistors
Zhengran He, et al.
Journal of Materials Science: Materials in Electronics, 30, 14335-14343 (2019)
Catalytic Diastereoselective Hetero-Diels?Alder Reaction of ?-Haloacroleins with Alkenes: Construction of 3,4-Dihydropyran
Lei Zeng, et al.
Organic Letters, 24, 2115-2119 (2022)
The effect of adding a new monomer ?Phene? on the polymerization shrinkage reduction of a dental resin composite
Jingwei He, et al.
Dental Materials Journal, 35, 627-635 (2019)
Toughening modification of (Acrylonitrile-styrene-acrylic copolymer)/(a-Methylstyrene-acrylonitrile copolymer) binary blend via using different impact modifiers."
Zhu W, et al.
Journal of Vinyl & Additive Technology (2014)
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