Sugar esters are formed by esterifying the hydroxyl groups of a monosaccharide or disaccharide with fatty acids or other acid groups. Sucrose fatty acid esters, for example, are widely used as food emulsifiers and cosmetic ingredients. For food applications in the US, sugar esters must have GRAS status or an approved food additive petition, and importers should verify the regulatory standing of the specific ester before commercial use.

The key step is confirming that the sugar in question is not one of the five named sugars with their own headings (sucrose, lactose, maltose, glucose, fructose). If the compound is a chemically pure monosaccharide or disaccharide outside those five — such as trehalose, xylose, or ribose — it falls here. A CAS number, purity certificate, and structural confirmation are the standard documentation a broker would use to support this classification.