also: あひさん
noun
arsenious acid; arsenous acid
Chemical term for H3AsO3; used in chemistry and toxicology contexts.
亜ヒ酸は毒性が強い化合物として知られている。
Arsenious acid is known as a highly toxic compound.
noun
arsenic trioxide; white arsenic
Colloquial use for As2O3, often encountered in historical poisoning cases or traditional pesticides.
昔、亜ヒ酸は殺鼠剤として使われていた。
In the past, white arsenic was used as a rodenticide.
砒素 is the element arsenic (As), while 亜ヒ酸 refers specifically to its acid or trioxide forms.
Compound of 亜 (a, 'sub-') + 砒/ヒ (hi, 'arsenic') + 酸 (san, 'acid'). The kanji 砒 is non-jōyō, so the mixed-kana spelling 亜ヒ酸 is common.