酸化ヒ素 さんかヒそ Also written さんかひそ, 酸化砒素 Meanings Noun arsenic trioxide; white arsenic (As2O3) See also: 亜ヒ酸 (あひさん). arsenic pentoxide (As2O5) Kanji 酸 acid. Read as サン. 化 transform 素 element. Read as ソ. Word lists Chemistry Jinuma: Japanese Dictionary · Word lists