1,3-Dichlorobenzene

{{Chembox

|ImageFile = M-Dichlorbenzol.svg

|ImageSize = 120px

|PIN = 1,3-Dichlorobenzene

|OtherNames =m-Dichlorobenzene; meta-Dichlorobenzene

|Section1={{Chembox Identifiers

|CASNo = 541-73-1

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

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

|UNII = 75W0WNE5FP

|PubChem = 10943

|ChemSpiderID = 13857694

|InChI = 1/C6H4Cl2/c7-5-2-1-3-6(8)4-5/h1-4H

|InChIKey = ZPQOPVIELGIULI-UHFFFAOYAZ

|StdInChI = 1S/C6H4Cl2/c7-5-2-1-3-6(8)4-5/h1-4H

|StdInChIKey = ZPQOPVIELGIULI-UHFFFAOYSA-N

|SMILES = ClC1=CC=CC(Cl)=C1}}

|Section2={{Chembox Properties

|C=6|H=4|Cl=2

|Appearance = Colorless liquid

|Density = 1.288 g/cm³

|MeltingPtC = -22 to -25

|BoilingPtC = 172 to 173

|Solubility = Insoluble

|MagSus = −83.19·10⁻⁶ cm³/mol}}

|Section3={{Chembox Hazards

|FlashPtC = 65}}

|Section4={{Chembox Related

| OtherCompounds = 1,3-Dibromobenzene

}}

}}

1,3-Dichlorobenzene (also known as meta-dichlorobenzene) is an aryl chloride and isomer of dichlorobenzene with the formula C₆H₄Cl₂. It is the least common of the three isomers of dichlorobenzene, and it is a colorless liquid that is insoluble in water. It is produced as a minor byproduct of the chlorination of benzene, but can also be prepared in a directed manner by the Sandmeyer reaction of 3-chloroaniline. It also arises from the isomerization of the other dichlorobenzenes at high temperature.U. Beck, E. Löser "Chlorinated Benzenes and other Nucleus-Chlorinated Aromatic Hydrocarbons" in Ullmann's Encyclopedia of Industrial Chemistry, 2012, Wiley-VCH, Weinheim. {{doi|10.1002/14356007.o06_o03}}