目前,市面上涂改液较多,使用涂改液的小学生也不断增加。然而,有关专家指出,涂改液中含有对人体有害的毒性物质,小学生不宜使用。涂改液有一种刺鼻的气味,是因为液体内含有挥发性化学物质,这些物质主要是二氯甲烷、三氯乙烷和对二甲苯等,它们都是有毒的。这些有毒物质的分子挥发后会游离于空气中,其中对二甲苯被人体吸收后,会引起头昏、头 At present, there are many correction fluids in the market, and pupils who use correction fluids are also increasing. However, relevant experts pointed out that the correction fluid contains toxic substances that are harmful to the human body and should not be used by primary school students. The correction fluid has a pungent odor because the liquid contains volatile chemicals, mainly methylene chloride, trichloroethane and paraxylene, which are toxic. The molecules of these toxic substances will be released from the air after volatilization, and paraxylene will be absorbed by the body and cause dizziness and head