It is just a white crystalline powder with molecular formula C4H4KNO4S plus a molecular weight of 201.24 g/mol. Source: Wikipedia E955 - Sucralose Sucralose: Sucralose is a man-made sweetener and sugar substitute. Nearly all ingested sucralose is just not broken down by the body, so it's noncaloric. In the European Union, It's also identified benea