Yes, TANGIBLE is a Scrabble word!

Letter values in Scrabble US: T 1, A 1, N 1, G 2, I 1, B 3, L 1, E 1.

Is it a valid word?

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

perceptible by the senses especially the sense of touch
capable of being treated as fact
(of especially business assets) having physical substance and intrinsic monetary value
capable of being perceived; especially capable of being handled or touched or felt