柯林斯詞典potassium permanganate 1. N a dark purple poisonous odourless soluble crystalline solid, used as a bleach, disinfectant, and antiseptic. Formula: KMnO4 高錳酸鉀 (Systematic name potassium manganate(VII)) 返回 potassium permanganate劍橋詞典a dark purple chemical used in industry , for example to kill germs (formula KMnO4) 高錳酸鉀 返回 potassium permanganate