Acetylene Gas is made of two hydrogen and two carbon atoms and is chemically represented as C2H2. This hydrocarbon is produced by one of two processes chemical reaction or thermal cracking, using different types of raw materials. It is a colourless, inflammable gas widely used as a fuel in oxyacetylene welding and cutting of metals and as raw material in the synthesis of many organic chemicals and plastics; its chemical formula is C2H2.The simplest process reacts calcium carbide with water to produce acetylene gas and a calcium carbonate slurry, called hydrated lime. The chemical reaction may be written as CaC 2 + 2 H 2 O → C 2 H 2 + Ca(OH) 2 Acetylene cylinders do not contain compressed or liquefied acetylene; instead they contain acetylene gas dissolved in acetone that is absorbed onto a porous mass within the cylinder. The porous mass inhibits the decomposition reaction, providing time for emergency action in the event of a mishap. IMR offers a comprehensive overview of the ...