Chitin is used in the analysis of Chitinase. It is plays a role in the formation of arthropod exoskeletons. Chitin can be processed further into different derivatives. The two main derivatives are chitosan and amino glucose. other applications in cosmetics include as carboxymethyl chitin (moisturizers, changes flow properties), antistatic effect due to cationic properties (hair products), as antibacterial and antifungal agents and for treatment of mucous membranes, in tumor therapies, in micro surgery, neurosurgery, for treatment of chronic wounds, ulcers and bleeding (chitin powder).
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M Rinaudo. Chitin and chitosan: properties and applications. Progress in polymer science. 2006, 31,(7), 603-632.