Bromalium is a chemical compound used as a sedative and hypnotic. Its spelling is based on the use of the prefix brom- to indicate the presence of a bromine atom, and the suffix -alium to denote a class of chemical compounds. The IPA phonetic transcription for this word is /bɹəʊˈmeɪliəm/, where the stress falls on the second syllable. The sound represented by "brom" is a voiced bilabial-palatal fricative, while the final "ium" is pronounced as a long "ee-uhm" sound.
Bromalin.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.