Isoprene

C₅H₈

IUPAC: 2-Methylbuta-1,3-diene

CAS: 78-79-5

Overview

Isoprene is the monomer of natural rubber and one of the most important hydrocarbons in biology. Trees emit over 500 million tonnes per year.

Composition

Element Symbol Atoms Atomic Mass
Hydrogen H 8 1.0080
Carbon C 5 12.0110

Elemental Composition

H
Hydrogen ×8
11.8%
C
Carbon ×5
88.2%

Uses

  • • Synthetic rubber (polyisoprene)
  • • Chemical intermediate

Fun Facts

  • ✦ Trees globally emit more isoprene than all human industrial activities combined

Safety

  • ⚠ Extremely flammable
  • ⚠ Irritant

Structure

SMILES

CC(=C)C=C

Properties

Type
organic
State
liquid
Molar Mass
68.12 g/mol
Density
0.6810 g/cm³
Melting Point
-145.9 °C
Boiling Point
34.1 °C
Solubility
insoluble

Molecular Descriptors

Exact Mass
68.0626
XLogP
2.5
TPSA
0.0 Ų
H-Bond Donors
0
H-Bond Acceptors
0
Rotatable Bonds
1
Heavy Atoms
5
Complexity
51.0

Related Compounds

1,2-Dichloroethane

C₂H₄Cl₂

1,3-Butadiene

C₄H₆

1,4-Dioxane

C₄H₈O₂

1-Butanol

C₄H₁₀O

2-Propanol

C₃H₈O

Acetaldehyde

CH₃CHO

Acetamide

C₂H₅NO

Acetic Anhydride

C₄H₆O₃

Acetone

(CH₃)₂CO

Acetonitrile

C₂H₃N

Frequently Asked Questions

What is Isoprene?
Isoprene (C₅H₈) is a organic compound with the IUPAC name 2-Methylbuta-1,3-diene.
What is the molecular weight of Isoprene?
Isoprene has a molar mass of 68.12 g/mol.
What state is Isoprene at room temperature?
Isoprene is a liquid at room temperature.
Is Isoprene organic or inorganic?
Isoprene is classified as an organic compound.
What elements make up Isoprene?
Isoprene (C₅H₈) is composed of Hydrogen (H), Carbon (C).