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Results 1 - 2 of 2 for Graphene
  1. Pencil swallowing 
    ... never contained lead. All pencils are made of graphite, which is a soft form of carbon. Carbon ... Graphite is relatively nonpoisonous. There may be no symptoms. If symptoms do occur, they may include stomachache ...
    https://medlineplus.gov/ency/article/002817.htm - Medical Encyclopedia
  2. Coal worker's pneumoconiosis 
    ... that results from breathing in dust from coal, graphite, or man-made carbon over a long time. ... Wear a protective mask when working around coal, graphite, or man-made carbon. Follow directions to prevent ...
    https://medlineplus.gov/ency/article/000130.htm - Medical Encyclopedia