Potassium persulfate
SIGALD/216224 - ACS reagent, ≥99.0%
Synonym: KPS; Potassium peroxodisulfate
CAS Number: 7727-21-1
Empirical Formula (Hill Notation): K2O8S2
Molecular Weight: 270.32
EC Number: 231-781-8
MDL Number: MFCD00011386
Linear Formula: K2S2O8
Product Type: Chemical
assay | ≥99.0% |
cation traces | Fe: ≤5 ppm |
heavy metals (as Pb): ≤0.001% | |
Mn: ≤2 ppm | |
form | powder or crystals |
grade | ACS reagent |
impurities | ≤0.001% Cl compounds |
≤0.005% insolubles | |
InChI | 1S/2K.H2O8S2/c;;1-9(2,3)7 |
InChI key | USHAGKDGDHPEEY-UHFFFAOYSA |
pH | 2.5-4.5 (25 °C, 27 g/L) |
Quality Level | 200 ![]() |
reaction suitability | reagent type: catalyst reaction type: C-H Activation |
reagent type: oxidant | |
SMILES string | [K+].[K+].[O-]S(=O)(=O)OO |
vapor density | 9.3 (vs air) |
vapor pressure | <0.1 hPa ( 25 °C) |
Application: |
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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-l |
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. |
Packaging: | 100, 500 g in poly bottle |
Packaging: | 5 g in glass bottle |
Symbol | ![]() ![]() ![]() |
Signal word | Danger |
Hazard statements | H272 - H302 - H315 - H317 - H319 - H334 - H335 |
Precautionary statements | P210 - P220 - P280 - P301 + P312 - P302 + P352 - P305 + P351 + P338 |
Hazard Codes | O,Xn |
Risk Statements | 8-22-36/37/38-42/43 |
Safety Statements | 22-24-26-37 |
RIDADR | UN 1492 5.1 / PGIII |
WGK Germany | WGK 1 |
Flash Point(F) | Not applicable |
Flash Point(C) | Not applicable |
Purity | ≥99.0% |
UNSPSC | 12352300 |