👉 Cornstarch is a chemical compound, also known as starch or amylose, that is found in certain types of cereal grains such as wheat and rye. It is a highly soluble polymer with a high melting point, making it suitable for use in coatings, adhesives, and other applications where stability and strength are critical. Cornstarch is used as a thickener in baking and can be used to thicken liquids or emulsify them.