CAS Number 7727-21-1
· Linear Formula K2S2O8
· Molecular Weight 270.32
· EC Number 231-781-8
· MDL number MFCD00011386
· PubChem Substance ID 329752184
Potassium persulfate is the inorganic compound with the formula K2S2O8. Also known as potassium peroxydisulfate or KPS, it is a white solid that is
highly soluble in water. This salt is a powerful oxidant, commonly used to
initiate polymerizations.
Detailed description
Uses
This salt is used to initiate polymerziation of
various alkenes leading to commercially important polymers such as styrene-butadiene
rubber and polytetrafluoroethylene and related
materials. In solution, the dianion dissociates to give radicals:[3]
[O3SO-OSO3]2− ⇌
2 [SO4]−
It is used in organic chemistry as an oxidizing agent,[4] for instance in the Elbs persulfate
oxidation of phenols and the Boyland–Sims oxidation of anilines.
As a strong yet stable bleaching agent it also finds use in
various hair bleaches and lighteners. Such brief and non-continuous use is
normally hazard free, however prolonged contact can cause skin irritation.[5] It has been used as
an improving agent for flour with the E number E922, although it is
no longer approved for this use within the EU.
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$222.65/KG OR $101.20/IB
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