:Ethanedisulfonic acid

{{Chembox

| Verifiedfields = changed

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| verifiedrevid = 428775980

| Name = Ethane disulfonic acid

| ImageFile_Ref = {{chemboximage|correct|??}}

| ImageFile = Ethanedisulfonic acid.png

| ImageSize =

| ImageName = Skeletal formula

| ImageFile1 = Ethanedisulfonic-acid-3D-balls.png

| ImageSize1 = 220px

| ImageName1 = Ball-and-stick model

| PIN = Ethane-1,2-disulfonic acid

| OtherNames = Edisylic acid

|Section1={{Chembox Identifiers

| CASNo_Ref = {{cascite|correct|??}}

| CASNo = 110-04-3

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

| UNII = DL69Y31QQV

| PubChem = 8032

| SMILES = OS(=O)(=O)CCS(=O)(=O)O

| ChemSpiderID_Ref = {{chemspidercite|changed|chemspider}}

| ChemSpiderID = 7741

| InChI = 1/C2H6O6S2/c3-9(4,5)1-2-10(6,7)8/h1-2H2,(H,3,4,5)(H,6,7,8)

| InChIKey = AFAXGSQYZLGZPG-UHFFFAOYAT

| StdInChI_Ref = {{stdinchicite|changed|chemspider}}

| StdInChI = 1S/C2H6O6S2/c3-9(4,5)1-2-10(6,7)8/h1-2H2,(H,3,4,5)(H,6,7,8)

| StdInChIKey_Ref = {{stdinchicite|changed|chemspider}}

| StdInChIKey = AFAXGSQYZLGZPG-UHFFFAOYSA-N

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|Section2={{Chembox Properties

| C=2 | H=6 | S=2 | O=6

| Density =

| MeltingPtC = 172 to 174

| MeltingPt_ref = Merck Index, 11th Edition, 3679
111-112 °C (dihydrate)

| BoilingPt =

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Ethanedisulfonic acid is a diprotic sulfonic acid, with pKa values of -1.46 and -2.06, making it a very strong acid. When used in pharmaceutical formulations, the salts with the active ingredient are known as edisylates.