title: [A new secondary chemical: the purity of products].
mesh_terms: D002617:Chemical Industry; D004340:Drug Contamination; D008722:Methods; D011108:Polymers; D011786:Quality Control; D013678:Technology, Pharmaceutical / Q000592:standards
chemical_list: D011108:Polymers
vernacular_title: Una nuova chimica secondaria: la purezza dei prodotti.