I19551

Isoprene

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

• Synonym(s): 2-Methyl-1,3-butadiene
• Linear Formula: CH₂=CHC(CH₃)=CH₂
• CAS Number: 78-79-5
• Molecular Weight: 68.12
• Beilstein/REAXYS Number: 969158
• MDL number: MFCD00008600
• UNSPSC Code: 12352100
• PubChem Substance ID: 24895956
• NACRES: NA.22

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.

Packaging

View returnable container options.

Safety Information

• 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_germany: WGK 3
• flash_point_f: -65.2 °F - closed cup
• flash_point_c: -54 °C - closed cup
• ppe: Eyeshields, Faceshields, Gloves