The word "sodophthalyl" is a technical term in chemistry, describing a type of organic compound. Its pronunciation is usually rendered as / sɒˌdɒfˈθeɪl /, which breaks down into several phonetic components. The first syllable, "so", is pronounced with a short "o" sound, as in "sofa". The following sequence of "doph" is pronounced as a single syllable, with a long "o" sound, like in "hope". Finally, "thalyl" is pronounced with a short "a" sound, like in "cat", and a stressed "yl" component.
A derivative of phenolphthalein, disodoquinone phenolphthalein; used as a laxative.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.