Yes, PECTINS is a Scrabble word!

Letter values in Scrabble US: P 3, E 1, C 3, T 1, I 1, N 1, S 1.

Is it a valid word?

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

any of various water-soluble colloidal carbohydrates that occur in ripe fruit and vegetables; used in making fruit jellies and jams