CHINA OVERSEAS SCIENCE & TRADE CO., LTD is a China based company located in Beijing, , known for its first in class 2-alpha-naphthol/coal tar pitch. Our mission is aimed towards serving statem...

China Overseas Science & Trade Co., Ltd. is located in Beijing, China. We manufacture and export all kinds of chemical products for construction field, and we also import some chemical materia...

2-naphthol, refined naphthalene,naphthalene sulfonate superplasticizer,Beta-naphthol,water reducing...