Application of 2-sulfobenzoic anhydride_Kain Industrial Additive

Background and overview[1] 2-Sulfobenzoic anhydride is an acid anhydride derivative and can be used in the pharmaceutical and chemical fields. Preparation[1] The preparation of 2-sulfobenzoic anhydride is as follows: under N2 protection, add 9.0g saccharin solid and 13mL concentrated sulfuric acid (concentration 98%) into a 50mL three-necked flask, stir and react at 140°C for 2…