Diphenylamine discolors in light. Diphenylamine can react violently with hexachloromelamine and trichloromelamine. Diphenylamine is incompatible with strong oxidizing agents and strong acids. Diphenylamine is also incompatible with iron and silver salts. Diphenylamine reacts with nitrogen oxides.
Air & Water Reactions
Dust may be explosive if mixed with air in critical proportions and in the presence of a source of ignition [USCG, 1999]. Insoluble in water.
Diphenylamine is an aromatic amine that was shown to exhibit antioxidant activities and is now used as an anti-scald agent. It is also used in the manufacture of a variety of substances, for instance, dye stuffs and their intermediates, pesticides, anthelmintic drugs, and as reagents in analytical chemistry laboratories.
ChEBI: An aromatic amine containing two phenyl substituents. It has been used as a fungicide for the treatment of superficial scald in apples and pears, but is no longer approved for this purpose within the European Union.
Insecticide, Fungicide, Herbicide, Plant growth
regulator: Topically in anti-screwworm mixtures, foliar application in a modified growth chamber to decrease ozone injury to
leaves of apple, bean, muskmelon, petunia, and tobacco plants.
To control weather fleck in tobacco and inhibit algae formation. To prolong the fresh appearance of snapdragons. Protect
rice from the toxic effects of thiolcarbamate herbicides  . Not
currently approved for use in EU countries (resubmitted) .
Registered for use in the U.S. and other countries.
NO- SCALD DPA 31; NO- SCALD DPA
283; SCALDIP; Z-876
Inhalation may irritate mucous membranes. Overexposure, including ingestion of solid or skin contact, may cause fast pulse, hypertension, and bladder trouble. Contact with dust irritates eyes.
Light tan to brown solid with a pleasant odor. Sinks in water.
Crystallise diphenylamine from pet ether, MeOH, or EtOH/water. Dry it under vacuum. [Beilstein 12 H 174, 12 IV 271.]
white crystals or powder