Yes, BROMIDE is a Scrabble word!

Letter values in Scrabble US: B 3, R 1, O 1, M 3, I 1, D 2, E 1.

Is it a valid word?

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

any of the salts of hydrobromic acid; formerly used as a sedative but now generally replaced by safer drugs
a trite or obvious remark