High Quality Content by WIKIPEDIA articles! Nitrogen trichloride, also known as trichloramine, trichlorine nitride (wrong in nomenclature of binary compounds; Nitrogen trichloride is a sound name following the rules of systematic nomenclature) is the chemical compound with the formula NCl3. This yellow, oily, pungent-smelling liquid is most commonly encountered as a byproduct of chemical reactions between ammonia-derivatives and chlorine (for example, in swimming pools between disinfecting chlorine and urea in urine from bathers). In pure form, NCl3 is highly reactive. Nitrogen trichloride can form in small amounts when public water supplies are disinfected with monochloramine, and at given levels it can irritate mucous membranes. Nitrogen trichloride was trademarked as Agene and used to artificially bleach and age flour. It has the same effect as that of tear gas, but has never been used as such.