Sodium persulfate is an inorganic compound with the formula Na 2 S 2 O 8 . This is the sodium salt of peroxydisulfuric acid, H 2 S 2 O 8 , the oxidizing agent. It is a water-soluble white solid. It's almost non-hygroscopic and has a good shelf life.
Video Sodium persulfate
Produksi
Salt is prepared by oxidation of sodium hydrogen sulfate electrolyte:
- 2 NaHSO 4 -> Na 2 S 2 O 8 H 2
Oxidation is done on platinum anodes. In this way about 165,000 tons were produced in 2005.
The standard redox potential of sodium persulfate to hydrogen sulfate is 2.1 V, which is higher than hydrogen peroxide (1.8 V) but lower than ozone (2.2 V). The sulphate radicals formed there have a standard electrode potential of 2.7Ã, V.
Maps Sodium persulfate
Apps
It is primarily used as a radical initiator for emulsion polymerization reactions for styrene-based polymers such as styrene acrylonitrile butadiene. Also applies to accelerate the hardening of low formaldehyde adhesives.
Other uses
It is a bleach, both stand-alone (especially in hair cosmetics) and as a detergent component. It is a substitute of ammonium persulfate in etching mixtures for zinc and printed circuit boards, and is used for preservation of copper and some other metals.
It is also used as a soil conditioner and for soil and groundwater remediation and in dye making, starch modification, bleach activator, desizing agent for oxidative disinfection, etc.
Organic chemistry
Sodium persulfate is a special oxidizing agent in chemistry, classically in Elbs persulfate oxidation and Boyland-Sims oxidation reaction. It is also used in radical reactions; for example in the synthesis of diapocynine from apocynin in which iron (II) sulfate is a radical initiator.
Security
Salt is an oxidizer and forms a combustible mixture with organic materials such as paper.
References
Source of the article : Wikipedia
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