Frey, Max published the artcileRecent methods in the investigation of propellants, Application of Bis(4-nitrophenyl)amine, the publication is Explosivstoffe (1964), 12(7), 149-57, database is CAplus.
Propellants contain gelatinized nitrocellulose (I) as the main energy producer in single-base powders, while double-base powders contain nitroglycerin (II) as a further energy producer that also aids gelatinization of the I. DNT and TNT have some gelatinizing properties and are contained in some kinds of powders as desensitizers. I and II give off nitrous gases on slow decomposition and stabilizing agents, such as Ph2NH, centralite, and 2-nitrodiphenylamine, which take up the nitrous gases, are included. The stabilizers become converted into nitroso and nitro compounds Colorimetry shows that, after storage, a powder stabilized with Ph2NH contains N-nitrosodiphenylamine, and mono-, di-, and trinitrodiphenylamines. Polarography was used for the analysis of propellants. Extraction of the propellant with CH2Cl 2and evaporation of the solvent gave a residue that was dissolved in MeOH. By polarography in an NH4OH/aqueous NH4Cl/MeOH buffer solution, the II and DNT/TNT could be estimated By first reducing the II with FeSO4, the nitro compounds derived from the diphenylamine stabilizers could be polarographically estimated by first hydrogenating all nitro compounds with a H/Pd catalyst, followed by polarography in tetramethylammonium bromide solution (reduction potential 2.6 v.), the dialkyl phthalates used as plasticizers could be estimated For example, 2 g. propellant was exstd. in a Soxhlet apparatus for 48 hrs. with CH2Cl2. The solvent is evaporated at 40¡ã and the residue is dissolved in MeOH and made up to 100 ml. To a 100-ml. flask, is added MeOH 5, EtOH 5, basic buffer solution (NH34Cl 5.3, 25% NH4OH 6.8, H2O 500, MeOH 500 g.), and fresh 0.2% gelatin solution 5 ml., and the solution made up to 100 ml. with more of the basic buffer solution This solution is polarographed. A further 5 ml. of the MeOH solution of the propellant extract is mixed with 5 ml. of a standard solution of the component to be determined, e.g. 1% II in EtOH, and made up to 100 ml. with the basic buffer solution and 5 ml. of the gelatin solution It is then polarographed. If the limiting current in the first case is i1 and in the second case i2, the % II is i1/(i2 – i1).
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, Application of Bis(4-nitrophenyl)amine.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia