Peroxydisulfuric acid

Peroxydisulfuric acid
IUPAC name μ-peroxido-bis(hydroxidodioxidosulfur) peroxydisulfuric acid
Other names Persulfuric acid, Peroxodisulfuric acid
Identifiers
CAS number	13445-49-3 Y
PubChem	24413
ChemSpider	22822 Y
ChEBI	CHEBI:29268 Y
Jmol-3D images	Image 1
SMILES O=S(=O)(OOS(=O)(=O)O)O
InChI InChI=1S/H2O8S2/c1-9(2,3)7-8-10(4,5)6/h(H,1,2,3)(H,4,5,6) Y Key: JRKICGRDRMAZLK-UHFFFAOYSA-N Y InChI=1/H2O8S2/c1-9(2,3)7-8-10(4,5)6/h(H,1,2,3)(H,4,5,6)/f/h1,4H InChI=1/H2O8S2/c1-9(2,3)7-8-10(4,5)6/h(H,1,2,3)(H,4,5,6) Key: JRKICGRDRMAZLK-UHFFFAOYAS
Properties
Molecular formula	H2O8S2
Molar mass	194.14 g mol−1
Appearance	Colourless solid
Melting point	65 °C, 338 K, 149 °F (Decomposes)
Solubility in water	soluble
Related compounds
Other cations	Potassium persulfate Sodium persulfate Ammonium persulfate
Related compounds	Peroxymonosulfuric acid Pyrosulfuric acid
Y acid (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Peroxydisulfuric acid is a sulfur oxoacid with the chemical formula H₂S₂O₈.^[1] It is also called Marshall's acid. In structural terms it can be written HO₃SOOSO₃H. It contains sulfur in its +6 oxidation state, but it also contains peroxide ions, which is why it appears to be in a higher oxidation state then sulfates. Its salts, commonly known as persulfates, are industrially important but the acid itself is not. The salts contain the peroxydisulfate ion. They are powerful oxidizing agents.

See also

• Peroxymonosulfuric acid

Made up of hydrogen peroxide and sulfur trioxide or by electrolysis of sulfuric acid

References

1. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Oxford: Butterworth-Heinemann. ISBN 0080379419.