4-Chlorobenzenesulfonic acid

CAS NO.：98-66-8
Empirical Formula: C6H5ClO3S
Molecular Weight: 192.62
MDL number: MFCD00065342
EINECS: 202-690-0
SAFETY DATA SHEET (SDS)
Update Date: 2026-05-08 10:32:36

What is 4-Chlorobenzenesulfonic acid?

Description

4-Chlorobenzenesulfonic acid is soluble in water and ethanol. Prepared by sulfonation of chlorobenzene with sulfuric acid; the water formed in the reaction is removed continuously. It can be hydrolyzed to chlorobenzene with steam at 190℃ and is used in the manufacture of 4-chloro-3-nitroben- zenesulfonic acid.

Chemical properties

greyish-beige flaked solid

The Uses of 4-Chlorobenzenesulfonic acid

4-Chlorobenzenesulfonic acid was employed as anion dopants for the matrix-assisted laser desorption/ionization-mass spectrometry (MALDI-MS) of neutral oligosaccharides.

What are the applications of Application

4-Chlorobenzenesulfonic acid is the major polar by-product formed during the synthesis of DDT

General Description

4-Chlorobenzenesulfonic acid is the major polar by-product formed during the chemical synthesis of 1,1,1-trichloro-2,2-bis-(4-chlorophenyl)ethane (DDT).

Properties of 4-Chlorobenzenesulfonic acid

Melting point:	102 °C
Boiling point:	149 °C/22 mmHg (lit.)
Density	1.449 (estimate)
storage temp.	Sealed in dry,Room Temperature
solubility	Chloroform (Slightly), Methanol (Sparingly)
pka	-0.83±0.50(Predicted)
form	solid
color	White to Light yellow to Light orange
Water Solubility	very faint turbidity
Merck	14,2122
Stability:	Stable. Incompatible with strong oxidizing agents.
CAS DataBase Reference	98-66-8(CAS DataBase Reference)
NIST Chemistry Reference	4-Chlorobenzene sulfonic acid(98-66-8)
EPA Substance Registry System	Benzenesulfonic acid, 4-chloro- (98-66-8)

Safety information for 4-Chlorobenzenesulfonic acid

Signal word	Danger
Pictogram(s)	Corrosion Corrosives GHS05 Exclamation Mark Irritant GHS07
GHS Hazard Statements	H302:Acute toxicity,oral H314:Skin corrosion/irritation
Precautionary Statement Codes	P260:Do not breathe dust/fume/gas/mist/vapours/spray. P270:Do not eat, drink or smoke when using this product. P280:Wear protective gloves/protective clothing/eye protection/face protection. P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.