295469

Sigma-Aldrich

2-Methylpropene

99%

Synonym(s):
Isobutylene
Linear Formula:
(CH3)2C=CH2
CAS Number:
Molecular Weight:
56.11
Beilstein/REAXYS Number:
773645
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.22

Quality Level

vapor density

2 (vs air)

vapor pressure

3278 mmHg ( 37.7 °C)

assay

99%

autoignition temp.

869 °F

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

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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

1 kg in Sure-Pac™
100, 400 g in Sure-Pac™

Other Notes

For 295469-450G-EU packaging: 1000 mL of aluminium cylinder equipped with brass steel valve.

Recommended products

  • For 295469-100G/400g/1kg:It is recommended that Brass hose adapter Z146811 is used for the 1 kg Sure-Pac.Brass hose adapter Z146811 or brass body mini gas regulator Z513539 is recommended.
  • For 295469-450G-EU: outlet fitting: DIN 477-1 no.1, Z742160 or Z742161 are the recommended regulators.

Pictograms

FlameGas cylinder

Signal Word

Danger

Hazard Statements

Precautionary Statements

hazcat

Flam. Gas 1 - Press. Gas Liquefied gas

storage_class_code

2A - Gases

WGK Germany

nwg

Flash Point(F)

-112.0 °F - closed cup

Flash Point(C)

-80 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

Certificate of Analysis

Certificate of Origin

Selective alkylation of p-xylene with 2-methylpropene by 12-tungstophosphoric acid.
Soeda H, et al.
Chemistry Letters (Jpn), 23(5), 909-912 (1994)
Molybdenum (III) Compounds as Catalysts for 2?Methylpropene Polymerization.
Hijazi A K, et al.
Angewandte Chemie (International Edition in English), 46(38), 7290-7292 (2007)
Solvent?Ligated Copper (II) Complexes for the Homopolymerization of 2?Methylpropene.
Li Y, et al.
Chemistry (Weinheim An Der Bergstrasse, Germany), 14(26), 7997-8003 (2008)
The synthesis of S-(+)-2, 2-dimethylcyclopropane carboxylic acid: a precursor for cilastatin.
Wang Q, et al.
Tetrahedron Asymmetry, 9(22), 3971-3977 (1998)
Nicolas Cottenye et al.
Chemical communications (Cambridge, England), 48(20), 2615-2617 (2012-02-02)
The polymer modification of short nucleotide sequences has been achieved for future use as self-assembled biologically active structures with sizes in the nanometre range. Co-assembly of the resulting DNA-based amphiphilic block copolymers with native proteins demonstrates the self-assembly of biological-like...
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