Acetylene
CAS 74-86-2C2H226.04 g/mol
Acetylene is a gas molecular entity, an alkyne and a terminal acetylenic compound.
IUPAC: acetylene
PubChem
Physical & Chemical Properties
| Melting Point | -119 °F (Sublimes) (NIOSH, 2024) |
| Boiling Point | -119 °F at 760 mmHg (USCG, 1999) |
| Density | 0.613 at -112 °F (USCG, 1999) - Less dense than water; will float |
| Solubility | 2 % (NIOSH, 2024) |
| Flash Point | 0 °F |
| Vapor Pressure | 44.2 atm (NIOSH, 2024) |
| Appearance | Acetylene appears as a colorless gas with a faint garlic-like odor. Easily ignited and burns with a sooty flame. Gas is lighter than air. Flame may flash back to the source of a leak very easily. Under prolonged exposure to fire or heat the containers may rupture violently and rocket. |
Data: PubChem · Last updated: 4/20/2026
GHS Classification
No GHS classification data available.
Classification data is sourced from ECHA.
Regulatory Compliance
TSCA
Listed
note: Status based on EPA TSCA Active Inventory · inventory name: TSCA Chemical Substance Inventory
View sourceGlobal Trade Intelligence
No trade flow data available for this chemical.
HS Code(s): 2901
Data: UN Comtrade
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