2-Nitrosodiphenyl

The negative-draft pollution-abatement system with condensing scrubber and mist and particulate filters effectively captured nitrosodiphenyl-amine and other fugitive emissions. 

NMOR = N-nitrosomorpholine, NDMA = N-nitrosodimethylamine, NDPhA = N-nitrosodiphenyl amine... 

Marqueyrol [74] reported experiments carried out in France over a period of 15 years to compare the efficiency of various stabilizers. The results are shown in Table 175. In addition to amyl alcohol and diphenylamine, the action of N-nitrosodiphenyl-amine (diphenylnitrosamine), carbazole, diphenylbenzamide, nitronaphthalene and naphthalene was also tested. The powder was stored at temperatures of 40, 60 or 75°C. The experiments were stopped when the powder showed signs of intense decomposition, giving off nitric oxides. This was also manifested by a sudden fall pf the nitrogen content in nitrocellulose isolated from the samples. 

C12H7N507 mw 333-22, N 21.02 yel ndls (from acet + chlf), mp — softens at 179° St melts at 184—85° (dec) sol in chlf St glac acet ac si sol in ale v si sol in acet gives with ale KOH a blood-red soln was prepd by pro- longed treatment of 3-nitro-N-nitrosodiphenyl-amine with 3 moles of nitric acid (d 1.42) in glac. acet acid (Refs 1 St 2) No expl props are reported... 

Soda-distillation method (see Available Stabilizer) and consists of residual DPhA of the propellant, plus the N-nitrosodiphenyl-amine, converted by the soda-distillation treatment to DPhA, and a small amt of 2-ni trodi phenyl am in e... 

DIPHENYLAMINE DERIVATIVES Diphenylamine-4 azide 4-Azidadiphenylamine or N>Phenyl-4>azidoaniline, N3.CgH,.NH.CgH5 mw 210.24, N 21.65% yel crysts (from ale) and reddish-yel (from peer eth) mp 71° (decomp above mp) bp — explodes on rapid heating very sol in ale sol in peer eth explodes when treated with coned nitric acid can be prepd by interaction of hydroxylamine-hydro-chloride, NH2OH.HCI, with 4-nitrosodiphenyl-amine, ON.CgH4.NH.CgH 5, in Na carbonate soln (Refs 1 2)... 

Place a portion of the reaction liquor in a small separatory funnel, add a little urea to destroy excess of nitrous add, and shake with ether to extract the nitrosamine. Separate the ether layer, wash it with dilute alkali and then with water. Evaporate the ether on a previously heated water-bath. To two drops of the resulting oil (or a few mg if a solid) add a drop of concentrated sulphuric acid. A blue colour here indicates the presence of nitrosodiphenyl-amine. If there is no blue colomr, treat two drops of the oil (or a few mg if a solid) with a small crystal of phenol and warm gently for 20 seconds. Cool and add 1 ml of concentrated stilphuric acid. An intense green-blue colour is produced, changing to red when poured into 30 ml of water, and becoming greenish-blue when an excess of sodiiim hydroxide solution is added. 

---