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I19551

Isoprene

Name: Isoprene
Brand: ALDRICH

99%, contains <1000 ppm p-tert-butylcatechol as inhibitor

Synonym(s):

2-Methyl-1,3-butadiene

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About This Item

Linear Formula:

CH₂=CHC(CH₃)=CH₂

CAS Number:

78-79-5

Molecular Weight:

68.12

UNSPSC Code:

12352100

NACRES:

NA.22

PubChem Substance ID:

24895956

MDL number:

MFCD00008600

Beilstein/REAXYS Number:

969158

Assay:

99%

Form:

liquid

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Properties

vapor density

2.35 (vs air)

Quality Level

200

vapor pressure

8.82 psi ( 20 °C)

assay

99%

form

liquid

autoignition temp.

428 °F

contains

<1000 ppm p-tert-butylcatechol as inhibitor

expl. lim.

10 %

refractive index

n20/D 1.422 (lit.)

bp

34 °C (lit.)

mp

−146 °C (lit.)

density

0.681 g/mL at 25 °C (lit.)

storage temp.

2-8°C

SMILES string

CC(=C)C=C

InChI

1S/C5H8/c1-4-5(2)3/h4H,1-2H2,3H3

InChI key

RRHGJUQNOFWUDK-UHFFFAOYSA-N

Description

Application

Isoprene in the presence of sec-butyllithium as an initiator can undergo sequential anionic polymerization with styrene and methyl methacrylate to form polystyrene-block-polyisoprene-block-poly(methylmethacrylate) (SIM) and polyisoprene-block-polystyrene-block-poly(methyl methacrylate) (ISM), two asymmetric triblock terpolymers. It is also used in the asymmetric synthesis of polystyrene-block-polyisoprene (PS-b-PI) diblock copolymers.

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pictograms

GHS02,GHS08

signalword

Danger

hcodes

H224,H341,H350,H412

pcodes

P202 - P210 - P233 - P273 - P308 + P313 - P403 + P233

Hazard Classifications

Aquatic Chronic 3 - Carc. 1B - Flam. Liq. 1 - Muta. 2

Storage Class

3 - Flammable liquids

wgk

WGK 3

flash_point_f

-65.2 °F - closed cup

flash_point_c

-54 °C - closed cup

ppe

Eyeshields, Faceshields, Gloves

Regulatory Information

危险化学品

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Morphology and elasticity of polystyrene-block-polyisoprene diblock copolymers in the melt.

Haenelt TG, et al.

Korea-Australia Rheology Journal, 26(3), 263-275 (2014)

Four-Phase Morphologies in Blends of ABC and BAC Triblock Terpolymers