Chitin is widely used in agriculture as a natural elicitor to enhance plant defense mechanisms. When applied to crops, it stimulates the production of defense-related enzymes and compounds, helping plants resist fungal, bacterial, and insect attacks. This reduces the need for synthetic pesticides.

In wastewater treatment, chitin serves as an effective adsorbent for heavy metals and dyes due to its ability to bind positively charged ions. It is used in filtration systems to remove contaminants from industrial effluents.

In medicine, chitin and its derivatives are used in wound healing products such as dressings and gels. They promote tissue regeneration, control bleeding, and have antimicrobial properties. Chitin-based materials are also explored in drug delivery systems for controlled release of medications.

In cosmetics, chitin is added to skincare products for its moisturizing and film-forming properties. It helps retain skin hydration and improves texture.

In the food industry, chitin is used as a dietary fiber and natural preservative. It extends shelf life by inhibiting microbial growth in packaged foods.