Yes, CAOUTCHOUC is a Scrabble word!

Letter values in Scrabble US: C 3, A 1, O 1, U 1, T 1, C 3, H 4, O 1, U 1, C 3.

Is it a valid word?

CAOUTCHOUC is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

an elastic material obtained from the latex sap of trees (especially trees of the genera Hevea and Ficus) that can be vulcanized and finished into a variety of products

Also: natural rubber, india rubber, gum elastic.