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Mercuric compounds

Mercuric compounds. Byung Joon Lim 5/14/2013. Dr. Karen Wetterhahn (1948-1997). A professor of chemistry at Dartmuth college Studied the toxicity of heavy metals A few drops of dimethylmercury on the protective latex gloves

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Mercuric compounds

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  1. Mercuric compounds ByungJoon Lim 5/14/2013

  2. Dr. Karen Wetterhahn(1948-1997) • A professor of chemistry at Dartmuth college • Studied the toxicity of heavy metals • A few drops of dimethylmercuryon the protective latex gloves • After six months, she suddenly became ill and died due to mercury poisoning • Surprisingly, she was taking all required PPE known at that time. http://en.wikipedia.org/wiki/Karen_Wetterhahn

  3. Mercury • Elemental mercury • Volatile and very toxic liquid • Inorganic mercury (Salts) • Toxic and corrosive • Mercury fulminate (HgONC)2: Detonator • Mercury (II) oxide: Strong oxidant • Organic mercury • Alkyl mercury: Extremely toxic and highly flammable • Aryl mercury: Various toxicity. Less toxic than alkyl ones c.f. Merbromine (mercurochrome) – Used as antiseptic

  4. Toxicity • ALL forms of mercury are very toxic! • Attack central nerve system • Tremors, impaired vision and hearing, and paralysis • Bioaccumulate in food chains • Poisoned by inhalation and direct absorption through SKIN

  5. Handling • Similar to other toxic materials • All PPEs • Lab coats, safety goggles, and proper gloves • Always in fume hood • Contact to EHS when you handle very toxic alkylmercuric compounds

  6. Waste disposal • Similar to other toxic materials • EVERYwaste should be stored in the fume hood until they can be removed from the lab. • All mixtures containing mercury in any formmust be disposed of as mercury contaminated waste and handled separately.

  7. Mercury spilling • Small spill • Collect droplets by hard papers or pipets • Use mercury spill kit: Amalgamate the mercury to avoid vapor emission • Or Call EHS • Larger spill (more than a thermometer) • Evacuate immediately and isolate the place • Call EHS • Lower the room temperature

  8. Alkylmercury spilling • Evacuate immediately and isolate the place • Call EHS • De-energize all sources of ignition http://www.ehs.gatech.edu/chemical/mercury_and_compounds.pdf http://www.esd.uga.edu/chem/pub/mercuryspill.pdf http://oes.tamu.edu/guidelines/mercury/EPO_Mercury_Safe_a.pdf

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