chemical impurity meaning in English

化学的不纯物
化学杂质

It is harmful for people to breathe air containing poisonous chemical impurities
人吸入含有毒化学杂质的空气是有损健康的。
600 series paper towel consists of 55 % cellulose and 45 % polyester , with high water absorbability , durable . bond is used to enhance its bidirectional strength and reduce chemical impurities
600系列净化抹纸由55 %纤维和45 %木桨混合而成的抹纸，它具有高吸水性，干净耐用的特点。混合过程中避免了化学粘合剂，从而增加了抹纸的双向强度及降低了化学杂质含量。