Halazone

Synonym(s):Halazone

CAS NO.：80-13-7
Empirical Formula: C7H5Cl2NO4S
Molecular Weight: 270.09
MDL number: MFCD00045858
EINECS: 201-253-1
SAFETY DATA SHEET (SDS)
Update Date: 2026-05-27 17:39:05

What is Halazone?

Chemical properties

white powder

Originator

Clordiapenser,Molteni Farmaceutici SpA.

The Uses of Halazone

antiinfectant

The Uses of Halazone

Water disinfectant.

Manufacturing Process

20 kg p-aminosulfonyl benzoic acid was mixed with 400 L 0.5 N NaOCl. After an acidification with 100 L 1 N acetic acid, a precipitate dropped out. It was filtered off, washed and dried. The obtained 4-((dichloroamino)sulfonyl) benzoic acid had MP: 203°C.

Therapeutic Function

Antiseptic, Antiseptic

General Description

Fine white powder with an odor of chlorine.

General Description

p-Dichlorosulfamoylbenzoic acid is a white, crystalline,photosensitive compound with a faint chlorine odor.Halazone is only slightly soluble in water at pH 7 but becomesvery soluble in alkaline solutions. The sodium salt ofhalazone is used to disinfect drinking water.

Air & Water Reactions

Insoluble in water.

Fire Hazard

Flash point data for Halazone are not available, but Halazone is probably combustible.

Properties of Halazone

Melting point:	195°C (rough estimate)
Boiling point:	437.0±47.0 °C(Predicted)
Density	1.5426 (rough estimate)
refractive index	1.6000 (estimate)
storage temp.	Store at -20°C,unstable in solution, ready to use.
solubility	Soluble in DMSO
form	neat
pka	3.29±0.10(Predicted)
form	Solid
color	White to off-white
Merck	14,4590
Stability:	Stable, but may be light sensitive. Incompatible with strong oxidizing agents.
CAS DataBase Reference	80-13-7(CAS DataBase Reference)
NIST Chemistry Reference	Benzoic acid, p-(dichlorosulfamoyl)-,(80-13-7)
EPA Substance Registry System	Halazone (80-13-7)

Safety information for Halazone

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation
Precautionary Statement Codes	P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P280:Wear protective gloves/protective clothing/eye protection/face protection.