Octenyl succinic anhydride is a chemical substance with long hydrophobic alkyl chains. Octenyl succinic anhydride undergoes esterification with polysaccharides such as Starch and Inulin . Octenyl succinic anhydride affects the interaction between molecules on the outer surface of two starch granules by changing the molecular surface structure. Octenyl succinic anhydride changes the properties of polysaccharides. Octenyl succinic anhydride can be used to esterify starch to produce hydrocolloid OS-starch with amphiphilic properties.