What was the name of the very first man-made plastic invented by Alexander Parkes in the 1850s?

Answer

Parkesine

Parkesine, invented by Alexander Parkes in the 1850s, was the first man-made plastic. It was created from natural substances like cellulose nitrate but was not designed to degrade.

What was the name of the very first man-made plastic invented by Alexander Parkes in the 1850s?
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