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…