Dinitrophenyl is any chemical compound containing two nitro functional groups attached to a phenyl ring. It is a hapten used in vaccine preparation. Dinitrophenyl does not elicit any immune response on its own and it does not bind to any antigen.
References
↑Berd, D; Maguire Jr, H. C.; Mastrangelo, M. J.; Murphy, G (1994). "Activation markers on T cells infiltrating melanoma metastases after therapy with dinitrophenyl-conjugated vaccine". Cancer Immunology, Immunotherapy. 39 (3): 141–7. doi:10.1007/s002620050105. PMID7923243.