Trithionic acid

Trithionic acid
Names
IUPAC names
  • Thiodisulfuric acid
  • 1,5-Dihydrido-2,2,4,4-tetraoxido-1,5-dioxy-2,3,4-trisulfy-[5]catena
  • Trithionic acid
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
  • InChI=1S/H2O6S3/c1-8(2,3)7-9(4,5)6/h(H,1,2,3)(H,4,5,6)
    Key: KRURGYOKPVLRHQ-UHFFFAOYSA-N
  • OS(=O)(=O)SS(=O)(=O)O
Properties
H2O6S3
Molar mass 194.19 g·mol−1
Density 2.4±0.1 g/cm3
Melting point 324.41 °C (615.94 °F; 597.56 K)
Boiling point 739.35 °C (1,362.83 °F; 1,012.50 K)
1.0·106 mg/L
log P −1.1
Vapor pressure 1.07·10−16 Pa (8.05·10−19 mm Hg)
Acidity (pKa) −6.94
Conjugate base Hydrogen trithionate
1.700
Pharmacology
Pharmacokinetics:
0.570 hours
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

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

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