12Martindale W, Royal Pharmaceutical Society of Great Britain. Dept. of Pharmaceutical Sciences (1993). The Extra Pharmacopoeia. Pharmaceutical Press. p.800. ISBN978-0-85369-300-0. Monalazone disodium is an antiseptic closely related structurally to halazone (see p.796) and is used as a vaginal disinfectant and spermicide. Proprietary Names Malun N. Sperlisin. Multi-ingredient preparations. Malun.