Monday, May 21, 2012

Information of 2,3,5,6-Tetramethyl-1,4-Phenylenediamine

p-Phenylenediamine (PPD)(1,4-phenylenediamine) is an organic compound with the formula C6H4(NH2)2. This derivative of aniline is a colorless solid, but typically samples can contain yellowish impurities arising from oxidation. It is mainly used as a component of engineering polymers and composites. It is also an ingredient in hair dyes.
CAS: 3102-87-2
Molecular Formula: C10H16N2
Formula Weight: 164.25
Information of 2,3,5,6-Tetramethyl-1,4-Phenylenediamine:
Density: 1.032 g/cm3
Melting Point: 150-155 °C(lit.)
Boiling Point: 310.6 °C at 760 mmHg
Flash Point: 167.8 °C
Appearance: light yellow powder.
Use: Used as medicine intermediate.
Storage: under cool dry place or refrigerator ventilation optimal cryopreservation.

PPD is a precursor to aramid plastics and fibers such as Kevlar. These applications exploit PPD's difunctionality, i.e. the presence of two amines which allow the molecules to be strung together. This polymer arises from the reaction of PPD and terephthaloyl chloride. The reaction of PPD with phosgene gives the diisocyanate, a precursor to urethane polymers.

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