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Methyl Mercaptan (CH3SH) Emergency Shutdown SystemAbout Methyl MercaptanOften referred to as ‘MESH’, Methyl Mercaptan is a very toxic and colorless flammable gas that gives off a repulsive odor. Upon inhalation or contact it attacks the central nervous system and can be lethal. It is used in organic synthesis and is an intermediate for jet fuel additives, fungicides, and methionine. At standard temperature and pressure, it exists as a gas. Its molecular weight is 1.66 times that of oxygen. MESH is shipped under its own vapor pressure of 15 psig @ 21.1°C in sealed tanks and ton containers. Railroad tank cars carrying MESH usually have top loading ball valves. Synonyms: Mercaptomethane, CH3SH, Methyl sulfhydrate, Methyl thioalcoho, Mercaptan methylique, Methaanthio, Methanthiol, Methvtiolo, Methylmercaptaan, Metilmercaptano, Rcra waste number U153, Thiomethano, UN 1064, Methanethiole Accidental Release of Methyl MercaptanIn the event of an accidental release of Methyl Mercaptan, it is important to shut off the source of the gas, if it can be done safely.Powell Emergency Valve Closure Systems are designed to prevent significant releases of hazardous gases like Methyl Mercaptan. In the case of an accidental release, the emergency shutdown system will immediately close the container valve, stopping the release regardless of where it occurs downstream. It is possible to prevent an accidental release of Methyl Mercaptan. Contact us today to discuss your specific application requirements. Back to List of Hazardous Gases Shutdown Systems for Various Container Sizes Powell is the only manufacturer to offer both pneumatic or electric systems for both small to large container sizes.
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