Tosylchloramide

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Tosylchloramide or N-chloro tosylamide, sodium salt, sold as chloramine-T, is a N–chlorinated and N–deprotonated sulfonamide used as a biocide and a mild disinfectant. It is a white powder that gives unstable solutions with water. Trade names of chloramine-T products include Chloraseptin, Chlorazol, Clorina, Disifin, Halamid, Hydroclonazone, Trichlorol, Minachlor, and generic Chloramin T or Tosylchloramide Sodium, among others.

Hypochlorite released from chloramine-T acts as an effective oxidizing agent for iodide to form iodine monochloride (ICl). ICl rapidly undergoes electrophilic substitution predominantly with activated aromatic rings, such as those of the amino acid tyrosine. Thus, chloramine-T is widely used for the incorporation of iodine to peptides and proteins. Chloramine-T together with iodogen or lactoperoxidase is commonly used for labeling peptides and proteins with radioiodine isotopes (¹²³I, ¹²⁵I or ¹³¹I).^[1]

Chloramine-T is available in tablet or powder form and has to be dissolved before use. It is sprayed on a surface and allowed to stand for at least 15 minutes before being wiped off or allowed to dry. It used in areas such as hospitals, laboratories, nursing homes, funeral homes, medical, dental and veterinary facilities, where control of pathogens is required, for disinfecting surfaces and soaking medical and dental equipment. The substance is also used for parasite control and for drinking water disinfection.

Chloramine-T is as an algicide, bactericide, virucide, fungicide (including spores), germicide. It is also effective against mycobacteria such as tuberculosis, foot-and-mouth disease and avian influenza. The molecular structure of toluenesulfonylamide is similar to para-aminobenzoic acid, an intermediate in bacterial metabolism, which is disrupted by this sulfonamide (in the same way as by a sulfa drug). Therefore, chloramine-T is capable of inhibiting with bacterial growth with two mechanisms, with the phenylsulfonamide moiety and the hypochlorite, which destroys the DNA structure via oxidation and thereby prevents microbes from reproducing and reforming.

Chloramine-T reacts readily with mustard gas to yield a harmless crystalline sulfimide; chloramine-T derivatives are being studied as protective agents against poison gas.^[2]

• EN 13713 Bactericidal
• EN 14675 Virucidal
• EN 14476 Virucidal Norovirus
• EN 1650 Fungicidal
• EN 13704 Sporicidal Clostridium difficile

• Chemicalland21.com: Chloramine T (Tosylchloramide sodium)
• InChem.org: Chloramine T
• “Disifin USA”. Retrieved 2010-02-09.

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