Reported in EPA TSCA Inventory.

The 4-Chlorobenzenesulfonic acid, with its CAS registry number 98-66-8, is a kind of acicular crystal. This is soluble in water and ethanol and it is usually applied as the intermediate of pharmaceutics and dyes, with its product categories including Organic acids; Organic Building Blocks; Sulfonic/Sulfinic Acids; Sulfur Compounds.

The characteristics of this chemical are as below: (1)ACD/LogP: 1.33; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): -2.17; (4)ACD/LogD (pH 7.4): -2.17; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 1; (8)ACD/KOC (pH 7.4): 1; (9)#H bond acceptors: 3; (10)#H bond donors: 1; (11)#Freely Rotating Bonds: 1; (12)Polar Surface Area: 51.75; (13)Index of Refraction: 1.59; (14)Molar Refractivity: 41.92 cm³; (15)Molar Volume: 124.1 cm³; (16)Polarizability: 16.62×10^-24 cm³; (17)Surface Tension: 54.5 dyne/cm; (18)Density: 1.551 g/cm³; (19)Boiling Point: 258.6 °C at 760 mmHg; (20)Vapour Pressure: 0.00696 mmHg at 25°C; (21)Exact Mass: 191.964792; (22)MonoIsotopic Mass: 191.964792; (23)Topological Polar Surface Area: 62.8; (24)Heavy Atom Count: 11; (25)Complexity: 211; (26)Covalently-Bonded Unit Count: 1.

Production method of this chemical: 4-chloro-benzenesulfonamide could react to produce 4-Chlorobenzenesulfonic acid. This reaction happens in the presence of the reagent of N₂O₄ and the solvent of acetonitrile. And it requires the reaction time of 0.5 hour(s) and the reaction temp. of  -20 ℃.

Use of this chemical: 4-Chlorobenzenesulfonic acid could react with maleimide to produce 3-(4-chloro-benzenesulfonyl)-pyrrolidine-2,5-dione. This reaction could happen in the presence of the solvent of methanol, and it needs the reaction time of 30 min in the condition of heating.

When you are dealing with this chemical, you should be cautious. For a kind of corrosive chemical, it may destroy living tissue on contact and may then causes burns. Therefore, you should wear suitable protective clothing, gloves and eye/face protection. If in case of contact with eyes, rinse immediately with plenty of water and seek medical advice, and if in case of accident or if you feel unwell seek medical advice immediately (show the label where possible). Then avoid contacting with skin and eyes, and you should take off immediately all contaminated clothing, and wash immediately with plenty of ... (to be specified by the manufacturer) after contacting with skin.

Additionally, you could obtain the molecular structure by converting the following datas:
(1)Canonical SMILES: C1=CC(=CC=C1S(=O)(=O)O)Cl
(2)InChI: InChI=1S/C6H5ClO3S/c7-5-1-3-6(4-2-5)11(8,9)10/h1-4H,(H,8,9,10)
(3)InChIKey: RJWBTWIBUIGANW-UHFFFAOYSA-N 

Below are the toxicity information of this chemical: