... , welding and cutting metals and so on 1. Using:High Purity acetylene can be used in lighting, welding and cutting metals ... fiber, such as the basic raw material. 2. Attribute:Acetylene is a colorless pure slightly aromatic odor of gas, since the ... -81 , inflammable, explosive limit in the air is very wide, 2.5% and 80%, and is insoluble in water, soluble in petroleum ether ...