MilliporeSigma
All Photos(3)

Documents

M80903

Sigma-Aldrich

α-Methylstyrene

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

Sign Into View Organizational & Contract Pricing

Synonym(s):
2-Phenylpropene, Isopropenylbenzene
Linear Formula:
C6H5C(CH3)=CH2
CAS Number:
Molecular Weight:
118.18
Beilstein/REAXYS Number:
969405
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.23

vapor density

4.1 (vs air)

Quality Level

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

Related Categories

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.

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_germany

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


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Documents related to the products that you have purchased in the past have been gathered in the Document Library for your convenience.

Visit the Document Library

Difficulty Finding Your Product Or Lot/Batch Number?

Product numbers are combined with Pack Sizes/Quantity when displayed on the website (example: T1503-25G). Please make sure you enter ONLY the product number in the Product Number field (example: T1503).

Example:

T1503
Product Number
-
25G
Pack Size/Quantity

Additional examples:

705578-5MG-PW

PL860-CGA/SHF-1EA

MMYOMAG-74K-13

1000309185

enter as 1.000309185)

Having trouble? Feel free to contact Technical Service for assistance.

Lot and Batch Numbers can be found on a product's label following the words 'Lot' or 'Batch'.

Aldrich Products

  • For a lot number such as TO09019TO, enter it as 09019TO (without the first two letters 'TO').

  • For a lot number with a filling-code such as 05427ES-021, enter it as 05427ES (without the filling-code '-021').

  • For a lot number with a filling-code such as STBB0728K9, enter it as STBB0728 without the filling-code 'K9'.

Not Finding What You Are Looking For?

In some cases, a COA may not be available online. If your search was unable to find the COA you can request one.

Request COA

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service