4,4'-(4,4'-Isopropylidenediphenyl-1,1'-diyldioxy)dianiline

-.Hebei Dangtong Biological Technology Co.,LTD founded in April 2004,has more than 960employees. Headquartered in Luquan District, Shijiazhuang city,Hebei Province, weare a professional manufacturer of alkaline dyes, chemical raw materials, foodadditives and pharmaceutical intermediates. The company has 3 production bases. Respectively in Hebei, Inner Mongolia, Yunnan three factory bases. It has two research centers and three laboratories specializing in the development of new products and the optimization of existing products. Committed to providing higher quality products and services to meet customer personalized needs. In terms of production, the company insists on integrated production, supplying main raw materials by itself, and laying out lean factories to ensure sustainable and stable supply.