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p-Phenylenediamine (PPD) is an organic compound with the formula C 6 H 4 (NH 2) 2. This derivative of aniline is a white solid, but samples can darken due to air oxidation. [ 1 ] It is mainly used as a component of engineering polymers and composites like kevlar .
Agents, mixtures and exposure circumstances that do not fall into any other group are also placed in this category. The IARC Monographs on which this list is based assess the hazard linked to the agents, they do not assess the cancer risk of the agents. [1] The list is up-to-date as of January 2024. [2]
Terephthaloyl chloride (TCL, 1,4-benzenedicarbonyl chloride) is the acyl chloride of terephthalic acid.It is a white solid at room temperature. It is one of two precursors used to make Kevlar, the other being p-phenylenediamine.
Retrieved from "https://en.wikipedia.org/w/index.php?title=Paraphenylenediamine&oldid=16367360"This page was last edited on 15 March 2004, at 18:29
o-Phenylenediamine (OPD) is an organic compound with the formula C 6 H 4 (NH 2) 2. This aromatic diamine is an important precursor to many heterocyclic compounds. OPD is a white compound although samples appear darker owing to oxidation by air. It is isomeric with m-phenylenediamine and p-phenylenediamine.
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Addicts hear the abstinence message from all corners, and many just stop taking medication because of it. According to Dr. Kreek, roughly 25 percent of methadone patients drop out over the course of the first year, and that’s with good counseling and proper dosing. Other studies show that the rate of methadone dropouts can be higher.
Phenylenediamine may refer to: o -phenylenediamine or OPD, a chemical compound C 6 H 4 (NH 2 ) 2 m -phenylenediamine or MPD, a chemical compound C 6 H 4 (NH 2 ) 2