Cornstarch has a wide range of applications.

Food processing industry

• Thickening agent : When preparing foods such as soups, sauces (like tomato sauce or meat sauce), gravies, puddings, and fillings, cornstarch can help increase their thickness. For instance, when making creamy mushroom soup, adding an appropriate amount of cornstarch will not only thicken the soup but also enhance its rich, velvety texture. This happens because, during the heating process, cornstarch granules absorb water and swell, gradually transforming the liquid into a thicker, more viscous consistency.
• Gelling agent : Used to make gelatinous foods such as jelly and gummy candies. Taking fruit jelly as an example, when cornstarch is mixed with water and heated, it forms a clear, elastic, gel-like substance that can encapsulate fruit juice and pulp, giving the jelly its distinctive texture and shape.
• Binder : In the preparation of certain foods, cornstarch helps bind the ingredients together. For example, when making fish balls or meatballs, adding cornstarch allows the meat particles to adhere more effectively, preventing them from falling apart during cooking. At the same time, it also helps retain the meat juices, enhancing the overall texture and flavor.
• Anti-stick agent : When making baked goods like pastries and cookies, cornstarch can be used as a non-stick agent. For example, when rolling out dough, sprinkling a small amount of cornstarch between the cutting board and the dough helps prevent sticking, making it easier to handle.

The paper-making industry

• Surface sizing agent Cornstarch can be used for surface sizing of paper. During the paper-making process, a starch-based sizing agent is applied to the paper’s surface, enhancing its surface strength, water resistance, and smoothness. This makes the paper more durable during printing, improves ink absorption, and helps prevent ink bleeding—ultimately leading to higher print quality.
• Internal additives : When added to pulp as an internal additive, it enhances the physical strength of paper, including tensile strength and tear resistance. This helps produce paper that is tougher and more durable, making it suitable for a variety of paper types such as writing paper and packaging paper.

Textile Industry

• Slurry : In the textile process, cornstarch can be used as a sizing agent for warp yarns. During weaving, warp yarns experience significant friction and tension. The cornstarch-based sizing agent forms a protective film on the surface of the warp yarns, enhancing their abrasion resistance and toughness, reducing yarn breakage during weaving, and ultimately improving weaving efficiency and product quality.

Pharmaceutical Industry

• Pharmaceutical excipients As a filler for tablets and capsules, corn starch helps shape the medication. At the same time, it also exhibits certain disintegrating properties, facilitating the release of the drug within the body. For instance, in some oral tablets, corn starch enables the tablet to break down quickly in the gastrointestinal tract, allowing the active ingredients to be absorbed more rapidly.

Chemical Industry

• Producing other chemicals Cornstarch can be used as a raw material to produce a variety of chemicals, such as glucose, maltose, sodium glutamate (monosodium glutamate, or MSG), and more. Through a series of chemical reactions, the molecular structure of cornstarch is altered, transforming it into these chemicals with specific applications. For instance, in the production of MSG, cornstarch undergoes processes like fermentation, ultimately yielding sodium glutamate.

Other uses

• Biodegradable materials With growing environmental awareness, cornstarch can now be used to produce biodegradable plastics. These plastics are capable of being broken down by microorganisms in natural environments, thereby reducing pollution and minimizing harm to the ecosystem.
• Building material additives : In some building materials, cornstarch can be used as an additive—for instance, in certain interior wall paints, where it helps enhance the paint’s rheology and adhesion properties.