In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Q: This element can be detected in a test that uses strips of paper sensitized with mercuric chloride placed in a bottle containing granulated zinc, water, and hydrochloric acid. Another test for this element precipitates metallic silver out of a silver nitrate solution after a compound containing this element is reacted with nascent hydrogen. Those tests, named respectively for Gutzeit and Marsh, are used to distinguish this element from antimony. Paul Erlich developed syphilis-treating drugs containing this element, such as atoxyl and Salvarsan. More modern drugs containing it include Mel B, which is used to treat trypanosomiasis, or sleeping sickness. People who were given it tended to have brick red-colored mucosa on the post-mortem. For 10 points, name this element famed as a poison.
A:
Science