60489

Potassium peroxodisulfate

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

• Synonym(s): Potassium persulfate
• Linear Formula: K₂S₂O₈
• CAS Number: 7727-21-1
• Molecular Weight: 270.32
• EC Number: 231-781-8
• MDL number: MFCD00011386
• UNSPSC Code: 12352302
• PubChem Substance ID: 329759024
• NACRES: NA.21

Properties

• grade: ACS reagent; puriss. p.a.
• 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

Description

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

Safety Information

• pictograms: GHS03,GHS08,GHS07
• signalword: Danger
• hcodes: H272,H302,H315,H317,H319,H334,H335
• pcodes: P210 - P220 - P280 - P301 + P312 - P302 + P352 - P305 + P351 + P338
• 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: 5.1B - Oxidizing hazardous materials
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges