Disperse Yellow 42, or 4-anilino-3-nitrobenzenesulfonanilide, is a

disperse dye Disperse dye is a category of synthetic dye intended for polyester and related hydrophobic fibers. Disperse dyes are polar molecules containing anthraquinone or azo groups. It is estimated that 85% of disperse dyes are azos or anthraquinone dye ...

that is primarily used to dye

polyester Polyester is a category of polymers that contain one or two ester linkages in every repeat unit of their main chain. As a specific material, it most commonly refers to a type called polyethylene terephthalate (PET). Polyesters include some natura ...

fibers. It is prepared by the reaction of two equivalents of

aniline Aniline (From , meaning ' indigo shrub', and ''-ine'' indicating a derived substance) is an organic compound with the formula . Consisting of a phenyl group () attached to an amino group (), aniline is the simplest aromatic amine. It is an in ...

with 4-chloro-3-nitro

benzenesulfonyl chloride Benzenesulfonyl chloride is an organosulfur compound with the formula C6H5SO2Cl. It is a colourless viscous oil that dissolves in organic solvents, but reacts with compounds containing reactive N-H and O-H bonds. It is mainly used to prepare sulfo ...

. An estimated 10,000 tons were prepared in 1990, making Disperse Yellow 42 the nitro dye produced on the largest scale.{{cite journal, doi=10.1016/0143-7208(92)80044-N, title=An approach to the design of lightfast disperse dyes-analogs of disperse yellow 42, year=1992, last1=Freeman, first1=Harold S., last2=Posey, first2=James C., journal=Dyes and Pigments, volume=20, issue=3, pages=171–195

References

Nitrobenzene derivatives Dyes Sulfonamides