Acetylene stones for chemical production accounted for about 60% and the remaining 40%for metal welding and cutting . formula : C2CaMW : 64. ... nature very lively and heated with water decomposition of acetylene gas, and calcium hydroxide, and release a lot ... , octanol, 3 cyanide ethylene, ethylene four cyanide, acetaldehyde, acetylene black, lime nitrogen. While the amount is the largest production ...