Qingdao Longyuntong Corporation is a professional chemicals company specialized in pigments, pigment intermediates and relating products. We supply Organic Pigments, Iron Oxides, Chrome Yellow/Green etc. We are a leading manufacturer of Naphthol AS series (AS, AS-BS, AS-D, AS-E,  AS-OL, AS-PH, AS-BO, AS-KB, AS-LC, AS-ITR, AS-CA，AS-P，AS-RL, AS-VL) and Base series (PABA, Red B Base, Scarlet RC Base, Red KD Base, Garnet GBC Base, Scarlet G Base etc.) with annual yield over 8,000MTs.