Agathodaimon
...that c.300, Egyptian alchemist Agathodaimon produced arsenic trioxide, an amphoteric oxide which he described as a 'fiery poison'?
...that <a class="mw-disambig" href="./Circa" id="mwC6E" rel="mw:WikiLink" title="Circa">c.</a><a href="./300" id="mwC6I" rel="mw:WikiLink" title="300">300</a>, <a href="./Egyptians" id="mwC6M" rel="mw:WikiLink" title="Egyptians">Egyptian</a> <a class="mw-redirect" href="./Alchemist" id="mwC6Q" rel="mw:WikiLink" title="Alchemist">alchemist</a> <b id="mwC6U"><a class="mw-redirect" href="./Agathodaimon" id="mwC6Y" rel="mw:WikiLink" title="Agathodaimon">Agathodaimon</a></b> produced <a href="./Arsenic_trioxide" id="mwC6c" rel="mw:WikiLink" title="Arsenic trioxide">arsenic trioxide</a>, an <a class="mw-redirect" href="./Amphoteric" id="mwC6g" rel="mw:WikiLink" title="Amphoteric">amphoteric</a> <a href="./Oxide" id="mwC6k" rel="mw:WikiLink" title="Oxide">oxide</a> which he described as a 'fiery <a href="./Poison" id="mwC6o" rel="mw:WikiLink" title="Poison">poison</a>'?