we are one of the largest manufacturers of diphenylamine around the world. our diphenylamine is very competitivein global market. properties:white crystal..turn pale and brown yellow when meet lights.gravity:1.160(20oc),boilpoint:302℃,little soluble in water,soluble in alcohol,ether,benzene and so on.can soluble in concentrated inorganic acid solution,but it can separate out if water is put to dilute.