Para-phenylene diamine

The diaminobenzenes are made from benzene by a combination chlorination-nitration route although para-phenylene diamine is also made directly from aniline. orr/to-Phenylene diamine is widely used for the preparation of biologically active compounds such as fungicides and veterinarian medicines. The mera-diamine is used in fire-retardant textile fibers ( Nomex ) while the / ara-diamine finds use in high-strength textile fibers used for bullet-proof vests, sails, army helmets, and other types of fiber-reinforced plastics ( Kevlar ). 

Antioxidants are routinely added to the compounds over and above those contained in the polymer at manufacture. Antiozonants prevent or reduce polymer degradation by the active ozone molecule. Some antioxidant compounds, such as the para-phenylene-diamines. are excellent as antiozonants. 

It is believed that metol poisoning results from trace contamination of para-phenylene-diamine (ppd) in the metol, not from the metol itself. Knowledge of this has changed the manufacturing process, and as a result, metol poisoning is less common than it once was. 

M28. Monckeberg, F., Vilddsola, J., Figueroa, M., Oxman, S., and Meneghello, J., Hematologic disturbances in infantile malnutrition. Values for copper, iron, para-phenylene diamine oxidase and iron-binding capacity in the serum. Am. J. Clin. Nutr. 11, 525-529 (1962). 

We have also investigated substances (HAC - LVII), (HAC - LI), being the products of condensation of phthalodinitrile with para-phenylene diamine in order to examine the effect of macrocyclic stabilizer structure on HAC properties. 

Tainter ML, James M, Vandeventer W. Comparative edemic actions of ortho meta and para-phenylene diamines in different species. Arch int Pharmacodyn 1929 36 152-162. 

Thus, the rmwanted sulphanilic acid remains in the solution as sodium sulphanilate, while the desired product dimethyl-para-phenylene diamine may be extracted successively with solvent ether as described earlier in Method-I. 

C22H10N2O4 polyimide based on 3,3, 4,4 -biphenyltetracarboxylic dianhydride and para-phenylene-diamine 210... 

Recently, Marken and coworkers [135] reported a novel method for the electrogeneration of ionic liquids in which microdroplets of N, N, N, N -. e. xah.exy -para-phenylene diamine (THPD) are deposited upon the surface of a basal plane pyrolytic graphite (or gold) electrode and are immersed into an aqueous electrolyte solution. The ionic liquid is formed as a consequence of the requirement to maintain electroneutrality upon oxidizing THPD,... 

Sir-Hashim M, Hamza YO, Yahia B, Khogali FM, Sulieman GI (1992) Poisoning from henna dye and para phenylene-diamine mixtures in children in Khartoum. Ann Trop Paediatr 12 3-6... 

Gebert et al. [52] have reported a synthesis of polyaniline using Schiff base chemistry. The reactions involve the condensation of para phenylene diamine with p-benzoquinone and can be written as (Scheme 12.9). The obtained polymer has a conductivity of 4 X 10 S m . ... 

Though much is known about the structure of caeruloplasmin little is known about its function. It is, as has already been stated, an oxidase for polyphenols and its ability to produce a coloured reaction compound with para-phenylene-diamine or its dimethyl derivative is the basis for most assay procedures [16, 22]. Caeruloplasmin can mediate electron transfer reactions [23] but it is difficult to see of what... 

---