noun
hydrocyanic acid; prussic acid; hydrogen cyanide
Chemistry term for the aqueous solution of hydrogen cyanide; synonymous with 青酸 (seisan).
See also: 青酸
シアン化水素酸は猛毒なので、取り扱いに注意が必要です。
Hydrocyanic acid is highly toxic, so careful handling is required.
Compound of シアン化 (cyanide) + 水素 (hydrogen) + 酸 (acid), calqued from English 'hydrocyanic acid'.