Acetylene (C2H2), also called Ethyne, is a chemical compound comprised of Carbon and Hydrogen. Acetylene is a hydrocarbon and the simplest alkyne. Acetylene does not have a melting point at atmospheric pressures, and thus cannot exist as a liquid. At atmospheric pressure, solid Acetylene will sublime at its melting point of −84.0 °C. Only at −80.8 °C and at a minimal pressure of 1.27atm, liquid Acetylene can exist. Pure Acetylene is odorless, but commercial grades usually have a marked odor due to impurities. Acetylene produces the hottest and most concentrated primary flame of all industrial fuel gases. It is unstable in its pure form and thus is usually handled as a solution, where Acetylene is dissolved in Acetone. The cylinders that Acetylene is filled into are typically more substantial than other cylinders because they are packed with a porous filler material.This material’s purpose is to stop the Acetylene from reacting within the cylinder.
The production of Acetylene gas is initialized by a chemical process in which calcium carbide reacts with Water. The results in the production of Acetylene gas and Calcium Hydroxide. Acetylene gas is extracted and then purified before being compressed and filled into cylinders.