Jiangsu Zhengdan Chemical Industry Co., Ltd is a high-tech enterprise founded in January 2007, engaged in development and manufacture of fine chemicals, such as Trimellitic anhydride (TMA), P-diethylbenzene (PDEB), Trioctyl Trimellitate(TOTM) and Mixed tr
Wellington Laboratories Inc. (WELLINGTON) is a world-leading producer and supplier of reference standards for potentially toxic, halogenated aromatic compounds of environmental concern.