Yes, PYROTECHNICS is a Scrabble word!

Letter values in Scrabble US: P 3, Y 4, R 1, O 1, T 1, E 1, C 3, H 4, N 1, I 1, C 3, S 1.

Is it a valid word?

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

(music) brilliance of display (as in the performance of music)
the craft of making fireworks
(usually plural) a device with an explosive that burns at a low rate and with colored flames; can be used to illuminate areas or send signals etc.

Not playable in Scrabble US: PYROTECHNY.