... the largest manufacturer in China 2.High quality and low price 3.Brand: BS Chemical 4.ISO 9001:2008 5. ... .5-10% coal tar is a complex mixture, rich in quinoline, isoquinoline, indole, α-Anaphthalene, β-methyltea, biphenyl, dimethyl tea, acenaphthene, fluorene ... addition, for the preparation of anti-corrosion oil, production of quinoline, indole, dispersants, water reducing agent. High purity wash oil ...