Acetylene

C₂H₂

IUPAC: Ethyne

CAS: 74-86-2

Overview

Acetylene is the simplest alkyne, producing an extremely hot flame (3,300°C) when burned with oxygen. It is used in welding and cutting metals.

Composition

Element Symbol Atoms Atomic Mass
Hydrogen H 2 1.0080
Carbon C 2 12.0110

Elemental Composition

C
92.3%

Uses

  • Oxy-acetylene welding
  • Chemical synthesis
  • Lighting (historical)

Fun Facts

  • Acetylene burns at about 3,300°C with oxygen — hot enough to melt most metals

Safety

  • ⚠ Extremely flammable
  • ⚠ Explosive when compressed
  • ⚠ Asphyxiant

Structure

SMILES

C#C

Properties

Type
organic
State
gas
Molar Mass
26.04 g/mol
Density
0.0011 g/cm³
Melting Point
-80.8 °C
Boiling Point
-84.0 °C
Solubility
1.07 g/L at 25°C

Molecular Descriptors

Exact Mass
26.0157
XLogP
0.4
TPSA
0.0 Ų
H-Bond Donors
0
H-Bond Acceptors
0
Rotatable Bonds
0
Heavy Atoms
2
Complexity
8.0

Frequently Asked Questions

What is Acetylene?
Acetylene (C₂H₂) is a organic compound with the IUPAC name Ethyne.
What is the molecular weight of Acetylene?
Acetylene has a molar mass of 26.04 g/mol.
What state is Acetylene at room temperature?
Acetylene is a gas at room temperature.
Is Acetylene organic or inorganic?
Acetylene is classified as an organic compound.
What elements make up Acetylene?
Acetylene (C₂H₂) is composed of Hydrogen (H), Carbon (C).