tiles


Note:  Do not rely on this information. It is very old.

Chitin

Chitin, a nitrogenous substance found in the skeletal tissues of many invertebrate animals. It is chiefly obtained from the shells of crabs, lobsters, or other crustaceans by dissolving out the mineral portion by hydrochloric acid. Its composition appears to be represented by the formula C15H26N2O10.