Yes, ACETONE is a Scrabble word!

Letter values in Scrabble US: A 1, C 3, E 1, T 1, O 1, N 1, E 1.

Is it a valid word?

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

the simplest ketone; a highly inflammable liquid widely used as an organic solvent and as material for making plastics

Also: dimethyl ketone.

Not playable in Scrabble US: PROPANONE.