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Occupational phosgene poisoning: a case report and review.
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  • Published on:
    Re:A Seventy-Five Year Old Mistake

    I read your letter and understand that you say r22 cant cause phosgene gas. It would be easier to believe this statement if almost everyone that has been soldering in the hvac field weren't overcome with some type of toxin in the process. I just today was soldering in a freezer that uses hp-80 refrigerant and all of the sudden could not breathe. It felt like my lungs weren't working for a half hour or so and I felt dizzy...

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    Conflict of Interest:
    None declared.
  • Published on:
    A Seventy-Five Year Old Mistake

    Since the early 1930's there has been a mistaken belief concerning what happens when the refrigerant gas, R-22, also known as chlorodifluoromethane, is exposed to high temperature heat sources. Admittedly, several compounds, including hydrogen fluoride (which then forms hydrofluoric acid when it comes into contact with water vapor in the air), hydrogen chloride (which then forms hydrochloric acid when it comes into conta...

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    Conflict of Interest:
    None declared.