EC21 Product Catalogs - p-toluenesulfonyl isocyanate http://www.ec21.com/ec-market/p-toluenesulfonyl isocyanate.html P-Toluenesulfonyl Isocyanate,PTSIhttp://litechem.en.ec21.com/P_Toluenesulfonyl_Isocyanate_PTSI--2575296_2575488.html1. Name: P-Toluenesulfonyl Isocyanate, Tosyl isocyanate, PTSI 2. Molecular formula: C8H7NO3S 3. Molecular weight: 197.220081218 P-toluenesulfonyl Isocyanatehttp://zhejiahua.en.ec21.com/P_toluenesulfonyl_Isocyanate--1447356_1483828.htmlAppearance: Light yellow liquid Purity: 98%min Color: 50APHA MAX Tosyl Chloride ,% ,1.0 Packing: 20 or 250 kgs/drum20060826