trithionic acid

{{Chembox

| Name = Trithionic acid

| ImageFile = Trithionic acid.svg

| IUPACNames = {{bulleted list|Thiodisulfuric acid|1,5-Dihydrido-2,2,4,4-tetraoxido-1,5-dioxy-2,3,4-trisulfy-[5]catena{{cite web |author=EBI Web Team |title=trithionic acid (CHEBI:29210) |url=https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:29210 |website=ChEBI |accessdate=23 September 2018 |language=en}}|Trithionic acid}}

| Section1 = {{Chembox Identifiers

| CASNo = 27621-39-2

| ChEBI = 29210

| ChEMBL = 3754893

| ChemSpiderID = KRURGYOKPVLRHQ-UHFFFAOYSA-N

| PubChem = 492

| SMILES = OS(=O)(=O)SS(=O)(=O)O

| InChI = 1S/H2O6S3/c1-8(2,3)7-9(4,5)6/h(H,1,2,3)(H,4,5,6)

| InChIKey = KRURGYOKPVLRHQ-UHFFFAOYSA-N

}}

| Section2 = {{Chembox Properties

| Formula = {{chem2|auto=1|H2O6S3}}{{cite web |title=Compound Report Card |url=https://www.ebi.ac.uk/chembl/compound/inspect/CHEMBL3754893 |website=EBI |accessdate=23 September 2018}}{{cite web |title=Trithionic acid |url=https://pubchem.ncbi.nlm.nih.gov/compound/Trithionic_acid |website=PubChem |accessdate=23 September 2018 |language=en}}

| H=2 | O=6 | S=3

| Formula_Charge = 0

| MolarMass_ref=

| Density = 2.4±0.1 g/cm³

| MeltingPtC = 324.41

| BoilingPtC = 739.35

| Solubility = 1.0·10⁶ mg/L

| LogP = −1.1

| VaporPressure = 1.07·10⁻¹⁶ Pa (8.05·10⁻¹⁹ mm Hg)

| pKa = −6.94

| ConjugateBase = Hydrogen trithionate

| RefractIndex = 1.700

}}

| Section6 = {{Chembox Pharmacology

| HalfLife = 0.570 hours

}}

}}

Trithionic acid is a polythionic acid with three sulfur atoms. It can be viewed as two bisulfite radicals bridged by a sulfur atom.