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Poisonous Gases

The gases on this list are either on the Department of Transportation's Category 1 list, or the Linde Specialty Gases company's Group 6 – Very Poisonous list. These chemicals are highly toxic gases at ambient temperature and pressure. They have an extremely high potential for causing significant harm if not adequately controlled.

  • Arsine                                             
  • Boron trichloride                          
  • Chlorine pentafluoride
  • Chlorine trifluoride                                        
  • Cyanogen
  • Cyanogen chloride
  • Diborane
  • Dinitrogen tetroxide
  • Fluorine
  • Germane                               
  • Hydrogen selenide
  • Nitric oxide
  • Nitrogen dioxide                                         
  • Nitrogen trioxide
  • Nitrosyl chloride
  • Oxygen difluoride               
  • Phosgene
  • Phosphine
  • Phosphorus pentafluoride                                    
  • Selenium hexafluoride                           
  • Stibine
  • Sulfur tetrafluoride                                            
  • Tellurium Hexafluoride
  • Tetraethyldithiopyrophosphate
  • Tetraethylpyrophosphate

Guidance:  Departments may choose to add other chemicals to the above list. For example, sulfur-containing compounds such as mercaptans can cause significant odor problems when used in the laboratory.  Pre-approval of the conditions under which they can be used may prevent odor complaints.
     
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