1.One of the largest manufacturer in China 2.High quality and low price 3.Brand: BS Chemical 4.ISO ... 6.5-10% coal tar is a complex mixture, rich in quinoline, isoquinoline, indole, α-Anaphthalene, β-methyltea, biphenyl, dimethyl tea, ... In addition, for the preparation of anti-corrosion oil, production of quinoline, indole, dispersants, water reducing agent. High purity wash oil with competitive price ...