a poisonous salt that forms dark purple crystals and is purple-red when dissolved in water; used as an oxidizing and bleaching agent and as a disinfectant and antiseptic.

• 一种有毒盐，形成深紫色晶体，溶于水中呈紫红色，用作氧化漂白剂、消毒剂和杀菌剂。