Peroxydisulfate

Peroxydisulfate
Names
	Other names Peroxodisulfate; Persulfate;
Identifiers
CAS Number	15092-81-6;
3D model ( JSmol)	Interactive image;
ChEBI	CHEBI:29267;
ChemSpider	97014;
PubChem CID	107879;
UNII	1SQ1481FEQ;
	InChI InChI=1S/H2O8S2/c1-9(2,3)7-8-10(4,5)6/h(H,1,2,3)(H,4,5,6)/p-2 Key: JRKICGRDRMAZLK-UHFFFAOYSA-L;
	SMILES [O-]S(=O)(=O)OOS([O-])(=O)=O;
Properties
Chemical formula	O8S2−2
Molar mass	192.11 g·mol−1
Conjugate acid	Peroxydisulfuric acid
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

The peroxydisulfate ion, S
₂O²⁻
₈, is an oxyanion, the anion of peroxydisulfuric acid. It is commonly referred to as persulfate, but this term also refers to the peroxomonosulfate ion, SO²⁻
₅. It is also called peroxodisulfate.^[2] Approximately 500,000 tons of salts containing this anion are produced annually. Important salts include sodium persulfate (Na₂S₂O₈), potassium persulfate (K₂S₂O₈), and ammonium persulfate ((NH₄)₂S₂O₈). These salts are colourless, water-soluble solids that are strong oxidants.^[3]

Applications

Salts of peroxydisulfate are mainly used to initiate the polymerization of various

alkenes, including styrene, acrylonitrile, and fluoroalkenes. Polymerization is initiated by the homolysis

of the peroxydisulfate:

[O₃SO–OSO₃]²⁻ ⇌ 2 [SO₄]^•−

Moreover, sodium peroxydisulfate can be used for soil and groundwater remediation, water and wastewater treatment, and etching of copper on circuit boards.^[4]^[2]

It has also been used to produce hair lighteners and bleaches, medical drugs, cellophane, rubber, soaps, detergents, adhesive papers, dyes for textiles, and in photography.^[2]

In addition to its major commercial applications, peroxydisulfate participates in reactions of interest in the laboratory:

Elbs persulfate oxidation
Oxidation of Ag⁺ to Ag²⁺, such as the preparation of tetrakis(pyridine)silver(II) peroxydisulfate

Structure

Peroxydisulfate is a centrosymmetric anion. The O-O distance is 1.48 Å. The sulfur centers are tetrahedral.^[5]

References

^ Ambiguous—see persulfate
^
S2CID 106396614
.

ISBN 978-3527306732.{{cite encyclopedia}}: CS1 maint: multiple names: authors list (link
)

doi:10.1016/j.cej.2017.07.132
.

doi:10.1107/S1600536806004302
.

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Salts and covalent derivatives of the persulfate ion

H₂SO₅
H₂S₂O₈ He

Li Be B C (NH₄)₂S₂O₈ O F Ne

Na₂S₂O₈ Mg Al Si P (SO₅)²⁻
(S₂O₈)²⁻ Cl Ar

KHSO₅
K₂S₂O₈ Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr

Rb Sr Y Zr Nb Mo Tc Ru Rh Pd C₂₀H₂₀N₄AgS₂O₈ Cd In Sn Sb Te I Xe

Cs Ba * Lu Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn

Fr Ra ** Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og

* La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb

** Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No

This inorganic compound–related article is a stub. You can help Wikipedia by expanding it.
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Retrieved from "https://en.wikipedia.org/w/index.php?title=Peroxydisulfate&oldid=1211048941"

[1] Ambiguous—see persulfate

[:0-2] 
S2CID 106396614
.

[Ullmann-3] ISBN 978-3527306732.{{cite encyclopedia}}: CS1 maint: multiple names: authors list (link
)

[4] :10.1016/j.cej.2017.07.132
.

[5] :10.1107/S1600536806004302
.

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