I found this bit of info on it from http://www.sugarbytes.com/Eatbigsweet.htm
They list several types of sugar and artificial sweetners.
Sucralose is the common name for the only calorie-free sweetener created from ordinary sugar. It looks and tastes like sugar, but is not broken down in the body and hence provides no calories. On average, sucralose is about 600 times more sweeter than sugar. Sucralose can be used like sugar in a wide range of foods and beverages due to its sweetness intensity, good water solubility and excellent product stability. Sucralose can be found in baked goods, drinks, frozen desserts, chewing gum, milk products, salad dressings, tabletop sweeteners, and alcoholic beverages.
Sucralose does not build up in the body nor does it promote cavities. Many studies have been done and evaluated on animals and humans over the past two decades and sucralose has been approved for use in Canada since 1991. The ADI of sucralose is 15 mg/kg. SPLENDA is available in two "tabletop" forms: granular and packet. The granular measures, pours and can be used like sugar even in cooking and baking, cup-for -cup. The granular form has 2 calories per teaspoon which are attributable to the carrier, maltodextrin. The packets can be use to sweeten coffee, tea and other beverages and to sprinkle on fruit, cereal and desserts. Each packet contains the equivalent of 2 teaspoons of sugar.