Plexiglass is not harmful to human body, but the daily use of some plexiglass products will do some harm to human body, but the harm is not great, because the organic compounds contained in the plexiglass cup will not dissolve in water. Polymethyl methacrylate (PMMA) is a popular name. The chemical name of this polymer transparent material is polymethyl methacrylate (PMMA). PMMA is synthesized from methyl methacrylate. There is also a name on the market - acrylic. Usually, plexiglass is also a substitute for many kinds of plastic products. Plastics belong to chemical polymer materials, most of which are normal and harmless to human health.