11. Natural gas is by nature odorless; gas companies add mercaptan so people can smell a leak. 12. In that process the disulfide bonds are reduced, typically using a mercaptan such as ammonium thioglycolate. 13. For example, the ethyl mercaptan ( ethanethiol ) has the formula C 2 H 5 SH. 14. In this way high mercaptan -laden gasoline is upgraded to meet certain country-specific specifications. 15. But mercaptan is one of the impurities that drops out of natural gas when it's cooled. 16. Four employees died of suffocation in a Houston, Texas accident involving leakage of nearly of methyl mercaptan . 17. In the underground mining industry, ethanethiol or ethyl mercaptan is referred to as " stench gas ". 18. The mercaptan -emitting scent glands are usually removed in pet skunks at about four weeks of age. 19. "' Perchloromethyl mercaptan "'is the organosulfur compound with the formula CCl 3 SCl. 20. The burning chemical was methyl mercaptan , or methanethiol, a flammable substance used in pharmaceutical and agricultural products.
