Isocyanate (NCO)

Isocyanates are a class of highly reactive organic compounds characterized by the isocyanate functional group (–N=C=O). They serve as key building blocks in the chemical synthesis of polyurethanes, adhesives, coatings, foams, and elastomers, primarily in industrial and manufacturing contexts[1][4][5]. Representative molecules include toluene diisocyanate (TDI), methylene diphenyl diisocyanate (MDI), and hexamethylene diisocyanate (HMDI)[5][6][7]. Isocyanates do not serve as biological targets for drugs or therapeutics, and exposure poses notable health risks including sensitization, respiratory disease, and potential carcinogenicity[1][8]. In summary, while isocyanates are important industrial chemicals, they are not considered bioreceptors, enzymes, or therapeutic targets, and the query reflects a category error. For therapeutic target information, the name should refer to a specific protein, receptor, enzyme, or other well-defined biomolecule.

Other names

IsocyanatesNCOCyanate (occasionally conflated, but chemically distinct)Diisocyanates (subset including common industrial chemicals, e.g., TDI, MDI)

not a drug target; reacts chemically with nucleophiles: alcohols, amines, acids, and bases