Halazone

Synonyms

4-(N,N-Dichlorosulfamoyl)benzoic acid; Benzoic acid, 4-((dichloroamino)sulfonyl)-; Cloritines; Halazon; Halazono [INN-Spanish]; Halazonum [INN-Latin]; Kyselina p-N,N-dichlorsulfamoylbenzoova [Czech]; Pantocid; Pantocide; Pantosid; Pantotsid; Parasulfondichloramido benzoic acid; Pentocid; Zeptabs; p-(Dichlorosulfamoyl)benzoic acid; p-(N,N-Dichlorosulfamoyl)benzoic acid; p-(N,N-Dichlorosulfamyl)benzoic acid; p-Carboxybenzenesulfondichloroamide; p-Sulfondichloramidobenzoic acid; Benzoic acid, p-(dichlorosulfamoyl)-; [ChemIDplus] 4-[(Dichloroamino)sulfonyl]benzoic acid; [Merck Index] 4-Carboxy-N,N-dichlorobenzenesulfonamide; p-(Dichlorosulfamoyl)benzoic acid; p-Dichlorosulfamoylbenzoic acid; p-Sulfondichloramidobenzoid acid; [CAMEO]

Category

Biocides/Disinfectants

Description

Solid with an odor of chlorine; [Merck Index]

Sources/Uses

A mixture of mono- and dichloroamides used as a water disinfectant; [Merck Index] "Halazone tablets were thus commonly used during World War II by U.S. soldiers for portable water purification, even being included in accessory packs for C-rations until 1945. The primary limitation of halazone tablets was the very short usable life of opened bottles, typically 3 days or less, unlike iodine-based tablets which have a usable open bottle life of 3 months. Sodium dichloroisocyanurate (NaDCC) has largely displaced halazone tablets for the few remaining chlorine based water purification tablets available today." [Wikipedia]

Comments

Causes chronic pulmonary edema in intravenous lethal-dose studies of rats; Causes altered gastric secretion and pigmented or nucleated red blood cells in 5-week intermittent oral studies of rabbits; [RTECS] May cause irritation; [Sigma-Aldrich MSDS]

No active product registrations in the US; [NPIRS]

Biomedical References

Processes

Industrial Processes with risk of exposure:

• Using Disinfectants or Biocides