also: むすいあヒさん
arsenic trioxide; white arsenic
Chemical compound As₂O₃; rare term, mainly used in technical or historical contexts. Also known as 亜砒酸 (arsenious acid).
See also: 亜ヒ酸
無水亜砒酸は毒性が強いため、取り扱いに注意が必要です。
Arsenic trioxide is highly toxic, so it must be handled with care.