Chemical Properties
grey powder
Definition
ChEBI: An N-substituted diamine that is 1,4-phenylenediamine in which one hydrogen from each amino group is replaced by a phenyl group.
Uses
Polymerization inhibitor. Antioxidant for rubber, petroleum oils, feedstuffs.
General Description
Gray or dark gray powder or flakes.
Reactivity Profile
N,N'-DIPHENYL-P-PHENYLENEDIAMINE(74-31-7) may react with oxidizing materials . Neutralizes acids in exothermic reactions to form salts plus water. May be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen may be generated in combination with strong reducing agents, such as hydrides.
Air & Water Reactions
Insoluble in water.
Fire Hazard
This chemical is combustible. This chemical may form explosive dust-air mixtures.
Description
N,N'-Diphenyl-4-phenylenediamine (DPPD) is a rubber
accelerant, formerly contained in the "black rubber
mix". The most frequent occupational categories are in
metal industry, homemakers, health services and
laboratories, and building industries.
Purification Methods
Crystallise the diamine from EtOH, chlorobenzene/pet ether or *benzene. It has also been crystallised from aniline, then extracted three times with absolute EtOH. [Beilstein 13 H 80.]
