Beijing Dilong Chemical Co.,Ltd was established in 1992,It is located in Yanshan Industry Area of Huangshan district in Beijing, It is one of the largest enterprises specializing in producing Antioxidant series products. We have six workshops, Now yearly production capacity for fluorescence brightener is over 8,000mt. For 13 years,our antioxidant series products have been exported to forty countries or areas over.Products and Company have been earned excellent reputation!