N-Nitroso-N-ethylaniline is a member of the N-nitrosamine class of compounds, which are classified as carcinogens by the Environmental Protection Agency.1 However, N-nitroso-N-ethylaniline is non-carcinogenic in a survival assay using 2FR450 Rauscher leukemia virus-infected rat embryo cultures.2 It is a synthetic intermediate in the synthesis of 3-amino-4-hydrazine-cyclobut-3-ene-1,2-diones as antagonists of chemokine (C-X-C motif) receptor 2 (CXCR2).3WARNING This product is not for human or veterinary use.