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Sodium persulfate



Other names Sodium peroxodisulfate Sodium peroxodisulphate Sodium peroxydisulfate Sodium peroxydisulphate
Identifiers
CAS number	7775-27-1^Y
PubChem	62655
ChemSpider	56406^Y
EC number	231-892-1
UN number	1505
ChEMBL	CHEMBL502764^Y
RTECS number	SE0525000
Jmol-3D images	Image 1
SMILES [Na+].[Na+].O=S(=O)([O-])OOS([O-])(=O)=O
InChI InChI=1S/2Na.H2O8S2/c;;1-9(2,3)7-8-10(4,5)6/h;;(H,1,2,3)(H,4,5,6)/q2+1;/p-2^Y Key: CHQMHPLRPQMAMX-UHFFFAOYSA-L^Y InChI=1/2Na.H2O8S2/c;;1-9(2,3)7-8-10(4,5)6/h;;(H,1,2,3)(H,4,5,6)/q2+1;/p-2 Key: CHQMHPLRPQMAMX-NUQVWONBAA
Properties
Molecular formula	Na₂S₂O₈
Molar mass	238.10 g/mol
Appearance	white powder
Density	2.40 g/cm³
Melting point	180 °C decomp.
Solubility in water	55.6 g/100 ml (20 °C)
Hazards
MSDS	ICSC 1136
EU Index	Not listed
R-phrases	R8 R20 R22 R36 R37 R38
S-phrases	S17 S26 S36
NFPA 704	0 2 1 OX
Flash point	Non-flammable
Related compounds
Other anions	Sodium dithionite Sodium sulfite Sodium sulfate
Other cations	Potassium persulfate
Y (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

Sodium persulfate (Na₂S₂ O₈) is a chemical compound. It is a strong oxidizer. It is a severe irritant of the skin, eyes, and respiratory system. It is almost non-hygroscopic and has particularly good ability to be stored for long time. It is easy and safe to handle. It is not combustible, but releases oxygen easily and assists combustion of other materials.

It is used as a bleach, both standalone (particularly in hair cosmetics) and as a detergent component. It is a replacement for ammonium persulfate in etching mixtures for zinc and printed circuit boards, and is used for pickling of copper and some other metals. It is a source of free radicals, making it useful as a radical initiator for emulsion polymerization reactions and for accelerated curing of low formaldehyde adhesives. It is also used as a soil conditioner and in manufacture of dyestuffs, modification of starch, bleach activator, desizing agent for oxidative desizing, etc.

Conditions/substances to avoid mixing persulfates with are: moisture, heat, flame, ignition sources, shock, friction, reducing agents, organic material, sodium peroxide, water, aluminium, and powdered metals.

Sodium persulfate is an oxidizing agent in chemistry, for example in a synthesis of diapocynin from apocynin where iron(II) sulfate is the radical initiator:^[1]

The sulfate radical formed in situ has a standard electrode potential of 2.7 V.

References [edit]

^ Luchtefeld, Ron; Dasari, Mina S.; Richards, Kristy M.; Alt, Mikaela L.; Crawford, Clark F. P.; Schleiden, Amanda; Ingram, Jai; Hamidou, Abdel Aziz Amadou et al. (2008). "Synthesis of Diapocynin". J. Chem. Ed. 85 (3): 411. doi:10.1021/ed085p411. |displayauthors= suggested (help)

v t e Sodium compounds

NaAlO₂ NaBH₄ NaBH₃(CN) NaBiO₃ NaBr NaBrO NaBrO₃ NaCH₃COO NaC₆H₅CO₂ NaC₆H₄(OH)CO₂ NaCN NaCl NaClO NaClO₂ NaClO₃ NaClO₄ NaF NaFO Na₂FeO₄ NaH NaHCO₃ NaH₂PO₄ NaHSO₃ NaHSO₄ NaI NaIO₃ NaIO₄ Na₅IO₆ NaMnO₄ NaN₃ NaNH₂ NaNO₂ NaNO₃ NaO₂ NaO₃ NaOH NaPO₂H₂ NaReO₄ NaSCN NaSH NaTcO₄ NaVO₃ Na₂CO₂ Na₂CO₃ Na₄CO₄ Na₂C₂O₄ Na₂CrO₄ Na₂Cr₂O₇ Na₂MnO₄ Na₃MnO₄ Na₂MoO₄ Na₂MoS₄ Na₂O Na₂O₂ Na₂O(UO₃)₂ Na₂S Na₂SO₃ Na₂SO₄ Na₂S₂O₃ Na₂S₂O₄ Na₂S₂O₅ Na₂S₂O₆ Na₂S₂O₇ Na₂S₂O₈ Na₂Se Na₂SeO₃ Na₂SeO₄ Na₂SiO₃ Na₂Si₂O₅ Na₄SiO₄ Na₂Te Na₂TeO₃ Na₂Po Na₂Ti₃O₇ Na₂U₂O₇ NaWO₄ Na₂Zn(OH)₄ Na₃N Na₃P Na₃VO₄ Na₄Fe(CN)₆ Na₅P₃O₁₀

Chemical formulas

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Sodium persulfate

References [edit]

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