Grindlay, J. W. published the artcileSpecial applications of thin-layer chromatography in the identification of diphenylamine derivatives, Recommanded Product: Bis(4-nitrophenyl)amine, the publication is Explosivstoffe (1973), 21(5), 177-81, database is CAplus.
Products of nitrosation and nitration of Ph2NH, 2-nitrodiphenylamine, N-nitrosodiphenylamine, 4-nitrosodiphenylamine, and N-methyldiphenylamine were separated and identified by thin-layer chromatog. by using microscope slides coated with thin layers of adsorbent. This technique is very rapid and simple. Tables of Rf values and colors developed with various reagents are presented. Preliminary information on the reactions was obtained by allowing Ph2NH and some of its derivatives on coated slides to react with nitric and nitrous fumes for various times before development. The results generally follow the pattern found in earlier investigations of Ph2NH reaction products in propellants in which Ph2NH derivatives were used as stabilizers.
Explosivstoffe 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