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295469

2-Methylpropene

99%

Synonym(s):

Isobutylene

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About This Item

Linear Formula:
(CH3)2C=CH2
CAS Number:
115-11-7
Molecular Weight:
56.11
UNSPSC Code:
12142100
NACRES:
NA.22
PubChem Substance ID:
24857786
EC Number:
204-066-3
Beilstein/REAXYS Number:
773645
MDL number:
MFCD00008898
Assay:
99%
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vapor density

2 (vs air)

Quality Segment

100

vapor pressure

3278 mmHg ( 37.7 °C)

assay

99%

autoignition temp.

869 °F

reaction suitability

reactivity: thiol reactive, reagent type: protection reagent

bp

−6.9 °C (lit.)

mp

−140 °C

SMILES string

CC(C)=C

InChI

1S/C4H8/c1-4(2)3/h1H2,2-3H3

InChI key

VQTUBCCKSQIDNK-UHFFFAOYSA-N

General description

2-methylpropene is used to synthesize S-(+)-2,2-Dimethylcyclopropane carboxylic acid via asymmetric cyclopropanation reaction.

Application

2-Methylpropene can be used in the following reactions:
  • Asymmetric synthesis of S-(+)-2,2-dimethylcyclopropane carboxylic acid, a key building block for the synthesis of cilastatin.
  • Alkylation of p-xylene to form t-butyl-p-xylene catalyzed by a heteropolyacid.
  • Synthesis of poly(2-methylpropene) or polyisobutene.

Packaging

Supplied in a Sure/Pac™ cylinder and has a brass needle valve with a male 1/4" NPTF outlet thread installed. Before using the cylinder, ensure that the valve is closed, then remove the galvanized steel hex cap that seals the outlet valve.

Compatible with the following:

Legal Information

Aldrich is a registered trademark of Sigma-Aldrich Co. LLC
Sure/Pac is a trademark of Sigma-Aldrich Co. LLC

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pictograms

FlameGas cylinder
GHS02,GHS04

signalword

Danger

hcodes

H220,H280

Hazard Classifications

Flam. Gas 1 - Press. Gas Liquefied gas

Storage Class

2A - Gases

wgk

nwg

flash_point_f

-112.0 °F - closed cup

flash_point_c

-80 °C - closed cup

ppe

Eyeshields, Faceshields, Gloves

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Certificates of Analysis (COA)

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