2,5-Thiophenedicarboxylic acid CAS NO.4282-31-9

In 2001 our company developed a new product-OB acid, the pilotscale experiment proved that the index reached the user requirements.through the purchas…

In 2001 our company developed a new product-OB acid, the pilotscale experiment proved that the index reached the user requirements.through the purchase of advanced testing equipment, stability of product quality greatly improved. After more than ten years of continuous improvement of the product. Our company have become the largest manufacturer of OB acid as perfect quality、stable product output and competitive price. We occupy a large market share both in domestic and foreign. Product name: ob acid (thiophene 2,5-dicarboxylic acid) Formula: ：C6H4O4S Molecular weight: 172.40. Loss on drying：0.50%(max). Residue on ignition: 0.50% (max) Use: Intermediates for fine chemicals, for the production of fluorescent brightener OB、EBF, etc. Such brighteners suitable for nylon, polyester, polypropylene, polyvinyl chloride, and three acetate fibers. it is an excellent product..