benzenesulfonyl chloride

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| ImageFile = Benzene sulfochloride.svg

| ImageSize =

| ImageAlt =

| PIN = Benzenesulfonyl chloride

| OtherNames =

|Section1={{Chembox Identifiers

| CASNo = 98-09-9

| CASNo_Ref = {{cascite|correct|CAS}}

| UNII_Ref = {{fdacite|correct|FDA}}

| UNII = OI9V0QJV9N

| PubChem = 7369

| ChemSpiderID = 7091

| InChI = 1/C6H5ClO2S/c7-10(8,9)6-4-2-1-3-5-6/h1-5H

| InChIKey = CSKNSYBAZOQPLR-UHFFFAOYAR

| StdInChI = 1S/C6H5ClO2S/c7-10(8,9)6-4-2-1-3-5-6/h1-5H

| StdInChIKey = CSKNSYBAZOQPLR-UHFFFAOYSA-N

| SMILES = C1=CC=C(C=C1)S(=O)(=O)Cl}}

|Section2={{Chembox Properties

| Formula = C₆H₅ClO₂S

| MolarMass = 176.62

| Appearance = colourless liquid

| Density = 1.384 g/mL at 25 °C(lit.)

| MeltingPtC = 13 to 14

| MeltingPt_notes =

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| Solubility = reacts}}

|Section3={{Chembox Hazards

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Benzenesulfonyl chloride is an organosulfur compound with the formula C₆H₅SO₂Cl. It is a colourless viscous oil that dissolves in organic solvents, but reacts with compounds containing reactive N-H and O-H bonds. It is mainly used to prepare sulfonamides and sulfonate esters by reactions with amines and alcohols, respectively.{{cite book|doi=10.1002/14356007.a03_507 |chapter=Benzenesulfonic Acids and Their Derivatives |title=Ullmann's Encyclopedia of Industrial Chemistry |date=2000 |last1=Lindner |first1=Otto |last2=Rodefeld |first2=Lars |isbn=978-3-527-30385-4 }} The closely related compound toluenesulfonyl chloride is often preferred analogue because it is a solid at room temperature and easier to handle.