Celluloid
It was the first thermoplastic. It was first called 'Parkesine' in 1856,  then 'Xylonite' in 1869 and then 'Celluloid' in 1870. Celluloid is easily molded and shaped. It was first widely used as an ivory replacement, in billiard balls for example. Celluloid catches fire very easily and also easily breaks down, and is no longer widely used.