Correct spelling for the English word "itrol" is [ˈɪtɹɒl], [ˈɪtɹɒl], [ˈɪ_t_ɹ_ɒ_l] (IPA phonetic alphabet).
A trade name for silver citrate, C5H5O7Ag3; a white powder soluble in 3800 parts of water, employed as a dusting powder in wounds and skin diseases, and for irrigation in solution of 1-4000 or 1-5000.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.