Diphenylamine( dpa )
I. Product properties
Diphenylamine( dpa ) is a colourless to gray solid crystal chemical. It will
Turn pale and brown yellow when meet lights. Gravity : 1.160(20/20, boiling
Point : 302'c, little soluble in alcohol, ether, benzene, etc. Can soluble
In concentrated inorganic acid solution. But it can separate out if water
Is put to dilute.
Ii. Technical specification
Quatity standard : Wj1801-88
No item unit value
1 appearance pale, yellow flakes
2 assay % 99. 5min
3 insoluble matter in alcohol % 0.05max
4 solidification point 'c 52.6
5 moisture % 0. 2max
6 reaction in water extract object neutral
Iii. Application
The product is widely used in rubber processing chemicals such as rubber
Antioxidant, dyestuffs, pharmaceuticals, as an additive for petroleum such
As as lubricating oil antioxidant, gunpowder stabilizer and plastic products.