8-Mercaptoquinoline

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| ImageFile = 8-mercaptoquinoline.png

| ImageSize =

| ImageAlt =

| PIN = Quinoline-8-thiol

| OtherNames = 8-Quinolinethiol
Mercaptoquinoline
Thiooxine

|Section1={{Chembox Identifiers

| CASNo = 491-33-8

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

| UNII = F77S9F93J4

| PubChem = 96028

| ChemSpiderID = 86692

| SMILES = c1cc2cccnc2c(c1)S

| InChI = 1/C9H7NS/c11-8-5-1-3-7-4-2-6-10-9(7)8/h1-6,11H

| InChIKey = MHTSJSRDFXZFHQ-UHFFFAOYAD

| StdInChI = 1S/C9H7NS/c11-8-5-1-3-7-4-2-6-10-9(7)8/h1-6,11H

| StdInChIKey = MHTSJSRDFXZFHQ-UHFFFAOYSA-N }}

|Section2={{Chembox Properties

| C=9|H=8|N=1|S=1

| Appearance = Colorless crystalline powder

| Density =

| MeltingPtC = 58.5

| BoilingPtC = 296

| Solubility = }}

|Section3={{Chembox Hazards

| MainHazards =

| FlashPt =

| AutoignitionPt = }}

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8-Mercaptoquinoline is the organosulfur compound with the formula C₉H₇NSH. It is a derivative of the heterocycle quinoline, substituted in the 8-position with a thiol group. The compound is an analog of 8-hydroxyquinoline, a common chelating agent. The compound is a colorless solid.Fleischer, Holger "Structural chemistry of complexes of (n - 1)d¹⁰ns^m metal ions with β-N-donor substituted thiolate ligands (m=0, 2)" Coordination Chemistry Reviews 2005, volume 249, pp. 799-827. {{doi|10.1016/j.ccr.2004.08.024}}