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arsenic - History

Who made the first clearly authenticated report of free elemental arsenic?

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A labeled diagram of the periodic table entry for arsenic, showing its atomic number 33, symbol As, atomic weight 74.921595, electron configuration, and classification as an other nonmetal. Additional icons indicate arsenic is solid at room temperature, has a rhombohedral crystal structure, and weakly acidic oxides. — arsenic Properties of arsenic.

The first clearly authenticated report of free elemental arsenic was made in 1649 by the German pharmacist Johann Schroeder. He successfully prepared the substance by heating its oxide with charcoal.1