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60489

Sigma-Aldrich

Potassium peroxodisulfate

puriss. p.a., ACS reagent, ≥99.0% (RT)

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Synonym(s):
Potassium persulfate
Linear Formula:
K2S2O8
CAS Number:
Molecular Weight:
270.32
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

grade

ACS reagent
puriss. p.a.

Quality Level

Assay

≥99.0% (RT)

form

powder or crystals

impurities

≤0.001% total nitrogen (N)

pH

2.5-4.5 (25 °C, 27 g/L)

anion traces

chloride (Cl-): ≤10 mg/kg

cation traces

Ag: ≤5 mg/kg
Al: ≤5 mg/kg
Ba: ≤5 mg/kg
Bi: ≤5 mg/kg
Ca: ≤50 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤5 mg/kg
Li: ≤5 mg/kg
Mg: ≤100 mg/kg
Mn: ≤1 mg/kg
Mo: ≤5 mg/kg
Na: ≤200 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Sr: ≤5 mg/kg
Tl: ≤5 mg/kg
Zn: ≤5 mg/kg

application(s)

forensics and toxicology

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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1 of 4

This Item
1.05091379824216224
Potassium peroxodisulfate puriss. p.a., ACS reagent, ≥99.0% (RT)

Sigma-Aldrich

60489

Potassium peroxodisulfate

Essential Grade
Potassium peroxodisulfate for analysis EMSURE®

Supelco

1.05091

Potassium peroxodisulfate

-
Potassium persulfate 99.99% trace metals basis

Sigma-Aldrich

379824

Potassium persulfate

-
Potassium persulfate ACS reagent, ≥99.0%

Sigma-Aldrich

216224

Potassium persulfate

Essential Grade
assay

≥99.0% (RT)

assay

≥99.0% (iodometric)

assay

99.99% trace metals basis

assay

≥99.0%

form

powder or crystals

form

solid

form

solid

form

powder or crystals

impurities

≤0.001% total nitrogen (N)

impurities

-

impurities

≤150.0 ppm Trace Metal Analysis

impurities

≤0.001% Cl compounds, ≤0.005% insolubles

pH

2.5-4.5 (25 °C, 27 g/L)

pH

3.2 (20 °C, 50 g/L in H2O)

pH

-

pH

2.5-4.5 (25 °C, 27 g/L)

anion traces

chloride (Cl-): ≤10 mg/kg

anion traces

chloride (Cl-): ≤0.001%

anion traces

-

anion traces

-

General description

Potassium peroxodisulfate is also known as potassium persulfate (K2S2O8). It is commonly used as an oxidizing agent and polymerization initiator in organic synthesis.

Application

Potassium peroxodisulfate can be used as:      
  • A polymerization initiator in the synthesis of polyacrylamide via radical polymerization of acrylamide.      
  • An oxidizing agent in the photochemical oxidation of atrazine aqueous solution.

K2S2O8 can also be used in the following process:      
  • K2S2O8-AgSCF3 catalytic system is used in the direct trifluoromethylthiolation of unactivated C(sp3)-H bonds under mild conditions. Usage of K2S2O8 in this process plays an important role in the activation of the C-H bond and the oxidation of AgSCF3.
  • K2S2O8-FeCl3 is used for the thiocyanation of 2H-indazoles using ammonium thiocyanate as a thiocyanating agent.

Other Notes

Oxidizing agent for decomposition by fusion

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

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Z. Sulcek et al.
Methods of Decomposition in Inorganic Analysis (1989)
R. Bock
Aufschlussmethoden der anorg. & org. Chemie (1972)
Bernaurdshaw Neppolian et al.
Water research, 44(12), 3687-3695 (2010-04-27)
The sonochemical oxidation of As(III) in the presence of peroxydisulfate ion (PDS) has been investigated. Sulfate anion radicals and OH radicals produced during acoustic cavitation readily oxidized As(III) to As(V) in an aqueous environment. The rate of oxidation of As(III)
Zhiyong Yang et al.
The Journal of organic chemistry, 77(16), 7086-7091 (2012-07-28)
Nontransition metal-catalyzed synthesis of 2-aryl benzothiazoles was achieved through K(2)S(2)O(8)-mediated oxidative condensation of benzothiazoles with aryl aldehydes. The same transformation can also be effected when the aryl aldehydes were replaced with phenylglyoxylic acids.
Xiuping Zhu et al.
Environmental science & technology, 48(12), 7157-7163 (2014-05-28)
Several technologies, including pressure-retarded osmosis (PRO), reverse electrodialysis (RED), and capacitive mixing (CapMix), are being developed to recover energy from salinity gradients. Here, we present a new approach to capture salinity gradient energy based on the expansion and contraction properties

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