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Sigma-Aldrich

Potassium persulfate

ACS reagent, ≥99.0%

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Synonym(s):
KPS, Potassium peroxodisulfate
Linear Formula:
K2S2O8
CAS Number:
7727-21-1
Molecular Weight:
270.32
EC Number:
231-781-8
MDL number:
MFCD00011386
PubChem Substance ID:
329752184
NACRES:
NA.21

grade

ACS reagent

Quality Level

200

vapor density

9.3 (vs air)

vapor pressure

<0.1 hPa ( 25 °C)

Assay

≥99.0%

form

powder or crystals

reaction suitability

reagent type: catalyst
reaction type: C-H Activation
reagent type: oxidant

impurities

≤0.001% Cl compounds
≤0.005% insolubles

pH

2.5-4.5 (25 °C, 27 g/L)

cation traces

Fe: ≤5 ppm
Mn: ≤2 ppm
heavy metals (as Pb): ≤0.001%

SMILES string

[K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O

InChI

1S/2K.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

InChI key

USHAGKDGDHPEEY-UHFFFAOYSA-L

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General description

Potassium persulfate is a water-soluble inorganic salt that releases oxygen and exhibits a strongly exothermic reaction. It is stable at room temperature but decomposes at high temperatures. Potassium persulfate is commonly used as an oxidant and in the polymerization of numerous monomers, mainly in the field of hydrogel synthesis.

Application

Potassium persulfate is used as an oxidizing agent:

  • in the oxidation of 4-Chloro-3-methylphenol in pressurized hot water and supercritical water in a continuous flow system.
  • in determinations of dissolved organic carbon.
Potassium persulfate (KPS) has also been used as a redox initiator :

  • in the graft polymerization of acrylonitrile onto starch in aqueous solution.
  • in the synthesis of sulfate radical anions via polymerization processes.
  • as polymerization and radical initiator in the synthesis of polyacrylamide-Laponite-lead dioxide nanoparticle hydrogel composites by acrylamide as monomers.

Signal Word

Danger

Hazard Classifications

Acute Tox. 4 Oral - Eye Irrit. 2 - Ox. Sol. 3 - Resp. Sens. 1 - Skin Irrit. 2 - Skin Sens. 1 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

5.1B - Oxidizing hazardous materials

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Information

危险化学品

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Potassium persulfate promoted catalytic wet oxidation of fulvic acid as a model organic compound in landfill leachate with activated carbon.
Xu XY, et al.
Chemical Engineering Journal, 200, 25-31 (2012)
Free radical degradation of chitosan with potassium persulfate.
Hsu SC, et al.
Polymer Degradation and Stability, 75(1), 73-83 (2002)
Toughening polystyrene by core-shell grafting copolymer polybutadiene-graft-polystyrene with potassium persulfate as initiator.
Di Cai G, et al.
Journal of Industrial and Engineering Chemistry (Amsterdam, Netherlands), 19(3), 823-828 (2013)
Kuo-Sheng Lee et al.
Neuron, 101(3), 421-428 (2019-01-20)
Callosal projections are thought to play a critical role in coordinating neural activity between the cerebral hemispheres in placental mammals, but the rules that govern the arrangement of callosal synapses on the dendrites of their target neurons remain poorly understood.
Huan Niu et al.
Biosensors & bioelectronics, 26(7), 3175-3180 (2011-01-18)
A novel label free electrochemiluminescence (ECL) immunosensor based on the ECL of peroxydisulfate solution for detection of α-1-fetoprotein (AFP) has been developed. For this proposed immunosensor, L-cysteine was firstly electrodeposited on the gold electrode surface, which promoted the electron transfer
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