Peroxydisulfuric acid

Peroxydisulfuric acid

Names
IUPAC names μ-peroxido-bis(hydroxidodioxidosulfur) peroxydisulfuric acid
Other names Persulfuric acid, Peroxodisulfuric acid
Identifiers
CAS Number	13445-49-3 Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:29268 Y
ChemSpider	22822 Y
PubChem CID	24413
UNII	2RQ1860626 Y
CompTox Dashboard (EPA)	DTXSID00894926
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
SMILES O=S(=O)(OOS(=O)(=O)O)O
Properties
Chemical formula	H2O8S2
Molar mass	194.13 g·mol−1
Appearance	Colourless solid
Melting point	65 °C (149 °F; 338 K) (decomposes)
Solubility in water	soluble
Conjugate base	Peroxydisulfate
Related compounds
Other cations	Potassium persulfate Sodium persulfate Ammonium persulfate
Related compounds	Peroxymonosulfuric acid Pyrosulfuric acid
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

Peroxydisulfuric acid is an inorganic compound with a chemical formula (HO₃SO)₂. Also called Marshall's acid after Professor Hugh Marshall, who discovered it in 1891.^[1]