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Potassium Persulfate is a white, finely crystalline, odourless salt consisting of technically pure potassium peroxodisulfate and silicic acid to enhance the free flowing properties. It is used as an initiator (source of free radicals) for the polymerisation of monomers and as a strong oxidising agent in many applications. It has the particular advantage of being only slightly hygroscopic and easy and safe to handle. As a result of the process used for its production it is free from contamination by ammonium ions. As a result of its extremely high purity it has a good storage stability. Due to its fine crystallinity potassium peroxodisulfate tends to lumping.
Polymerisation:
Initiator for the emulsion or solution polymerisation of acrylic monomers, vinyl acetate, vinyl chloride etc. and for the emulsion copolymerisation of styrene, acrylonitrile, butadiene etc. Dosage: 0.1-0.5% KPS-5 (PPS). Temperature: 75-95°C. In combination with redox systems (ascorbic acid, Rongalit, sulfites or sugar - possibly in combination with heavy metal salts such as Fe2+ it can also be used for polymerisation reactions carried out at lower - and even at ambient - temperatures. To reduce the residual monomer content, a combination of KPS-5 (PPS) with TBHP-70-AQ is recommended, particularly in cases where redox systems are used.
Cosmetics: Essential component of bleaching formulations.
Paper: Modification of starch; Repulping particularly of wet-strength paper.
Textile: Desizing agent and bleach activator - particularly for cold bleaching (e.g. bleaching of Jeans).
Others:
- Chemical synthesis
- Water treatment (decontamination)
- Waste gas treatment; oxidative degradation of harmful substances (e.g. Hg)
PACKAGING, STORAGE & SHELF LIFE :
25 kgs and 1000 kgs net polyethylene and polypropylene bags. 1000 kgs bag has antistatic properties. It must be stored in well closed original packing and protected from direct sunlight, heat and humidity. Impurities such as dirt, rust or traces of metal and reductants may cause catalytic decomposition. It can be stored for 24 months below 30°C. The product as supplied or in solution needs to be handled with appropriate care. The eye, skin and clothes must be protected when working with PPS as damp powder or aqueous solution has a bleaching and slightly corroding effect.
SAFETY & PRECAUTIONS :
Avoid contact with eyes, skin and clothing. Use with adequate ventilation. Do not swallow. Avoid breathing vapors, mists or dust. Do not eat, drink or smoke in work area. Prevent contact with combustible or organic materials. Label containers and keep them tightly closed when not in use. Wash thoroughly after handing. For drinking water applications, the optimum dosing must be max. 43 mg/L.
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