Chitin

Chitin (C8H13O5N)n (IPA: ) is a long-chain polymeric polysaccharide of beta-glucose that forms a hard, semitransparent material found throughout the natural world. is a semitransparent material that is the main component of the exoskeletons of arthropods, such as crustaceans (e.g. crab, lobster and shrimp) and insects (e.g. ants, beetles and butterflies), of the cell walls of fungi, the radula of molluscs and the beaks of cephalopods (e.g. squid, and octopuses). Chitin has also proven useful for several medical and industrial purposes.

 References 

 Other websites 
 Chitin Product Information from China GreatVista Chemicals 
 Horseshoe Crab Chitin Research 

Category:Polysaccharides
Category:Macromolecules
Category:Natural materials