Asquith, Raymond S. published the artcileThe fading of nitrodiphenylamine disperse dyes in relation to their structure and ultraviolet absorption spectra, Recommanded Product: Bis(4-nitrophenyl)amine, the publication is Journal of the Society of Dyers and Colourists (1968), 84(10), 507-10, database is CAplus.
A series of dinitrodiphenylamines was prepared by heating the appropriate BrC6H4NO2 with the O2NC6H4NHAc for 16 hrs. at 180¡ãC. in the presence of anhydrous K2CO3 and CuBr. The absorption spectra in the range 200-560 nm. were recorded for all of the purified dyes (25 ¡Á 10-6M) in absolute alc. All showed maximum in the 370-430 nm. region. Each dye was ground in a ball mill for 24 hrs. with H2O and a 10% solution of Dispersol VL. A 1% dyeing on secondary cellulose acetate was prepared Samples of the dyed material were exposed in a Xenotest 450 fading lamp at 30¡ã and 45% relative humidity. Exposure was continued until Blue Standard 7 had just started to fade (about 102 hrs.). All dyes darkened in color, turned brown, and then faded to a lighter color.
Journal of the Society of Dyers and Colourists published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C12H9N3O4, Recommanded Product: Bis(4-nitrophenyl)amine.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia