Yes, ACRYLIC is a Scrabble word!

Letter values in Scrabble US: A 1, C 3, R 1, Y 4, L 1, I 1, C 3.

Is it a valid word?

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

polymerized from acrylonitrile
a glassy thermoplastic; can be cast and molded or used in coatings and adhesives
used especially by artists
a synthetic fabric

Also: acrylic fiber, acrylic resin, acrylate resin, acrylic paint.