Yes, PASCAL is a Scrabble word!

Letter values in Scrabble US: P 3, A 1, S 1, C 3, A 1, L 1.

Is it a valid word?

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

a unit of pressure equal to one newton per square meter
French mathematician and philosopher and Jansenist; invented an adding machine; contributed (with Fermat) to the theory of probability (1623-1662)
a programing language designed to teach programming through a top-down modular approach

Also: blaise pascal.