| Clinical data | |
|---|---|
| Trade names | Naclobenz-Natrium, Spergisin, Speton |
| Other names | p-(Chlorosulfamoyl)benzoic acid |
| Routes of administration | Vaginal |
| Drug class | Disinfectant |
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| Chemical and physical data | |
| Formula | C7H6ClNO4S |
| Molar mass | 235.64 g·mol−1 |
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Monalazone, used as monalazone disodium (INN; the disodium salt) and sold under the brand names Naclobenz-Natrium, Spergisin, and Speton, is a vaginal disinfectant or antiseptic and spermicidal contraceptive. It is a sulfonylbenzoic acid derivative and is closely related structurally to halazone. The compound was synthesized in 1937. A vaginal tablet combination of 0.125 mg estradiol benzoate and 10 mg monalazone was previously marketed under the brand name Malun 25.
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.