Isoprene

CAS Number

78-79-5

Molecular Formula

C₅H₈

Also known as:

Isoprene; 2-methyl-1,3-butadiene; 2-methylbutadiene

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Product Description

Isoprene (2-methyl-1,3-butadiene) is a volatile C5 diene used primarily as the monomer feedstock for polyisoprene and other diene-based polymers, and as a chemical intermediate in specialty elastomers and copolymers. Product is supplied in grades controlled for inhibitor content and volatile/impurity profile to meet polymerization and downstream-process requirements.

Application

  • Synthetic polyisoprene production
    Primary monomer for polymerization to produce polyisoprene (synthetic rubber) used in tires, seals and elastomeric goods.
  • Copolymers & specialty elastomers
    Co-monomer in styrene-isoprene, butadiene-isoprene and other copolymer systems for tailored mechanical properties.
  • Adhesives & pressure-sensitive formulations
    Feedstock for elastomeric adhesives and PSA polymers where diene-derived tack and elasticity are required.
  • Chemical intermediate & specialty syntheses
    Building block for specialty organic syntheses and functionalized diene derivatives.
  • Research, pilot-scale polymer development & analytical use
    Small-pack high-purity lots used in R&D, pilot polymerization and analytical method development.

Technical Parameters

Parameter Value
Assay ≥ 99.0–99.8%
Water / Moisture (KF) ≤ 0.02–0.1%
Melting point ≈ −140 to −145 °C
Boiling point ≈ 34 °C
Density ≈ 0.68–0.69 g·cm⁻³ (20 °C)

Applications

Sealants/Anaerobic Adhesives

Quick Information

EINECS 201-143-3
Molecular Weight 68.12 g/mol

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