molecular formula, molecular weight & constitutional formula
molecular formula:Na₂S₂O₈
constitutional formula:

Molecular Weight:238.13
CAS: 7775-27-1UN : 1505

Mainly physicochemical properties & technical data:
Sodium persulfate is a white, crystalline, odourless salt or powder. It is dissolved by ethanol, and has a good stability in normal temperatureIt is used as initiator for the polymerisation of monomers and as a strong oxidizing agent in many applications. It has the particular advantage of being almost non-hygroscopic, of having a particularly good storageand of being easy and safe to handle.

Main Application

Application:
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% NPS (SPS). Temperature: 75-95°C. In combination with redox systems (ascorbic acid, Rongalit, sulfites or sugar -possibly in combination with heavy metal salts such as Fe 2+ 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 NPS (SPS) with TBHP-78-AQ is recommended, particularly in cases where redox systems are used.

Metal treatment: Treatment of metal surfaces (e.g. in the manufacture of semiconductors; cleaning and etching of printed circuits), activation of copper and aluminium surfaces.

Cosmetics: Essential component of bleaching formulations.

Paper: Modification of starch; Repulping of wet-strength paper.

Textile: Desizing agent and bleach activator - particularly for cold bleaching (i.e. bleaching of Jeans).

Others:
- Chemical synthesis
- Water treatment (decontamination)
- Waste gas treatment, oxidative degradation of harmful substances (e.g. Hg)
- Disinfectant

Storage:
NPS (SPS) is not combustible but assists combustion of combustible materials due to release of oxygen. Provided it is stored under appropriate condition. It must be stored dry in closed containers and protected from direct sunlight, heat and humidity. Impurities such as dirt, rust or traces of metal and reductants may cause catalytic decomposition. 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 NPS (SPS). NPS (SPS) as damp powder or aqueous solution has a bleaching and slightly corroding effect.

Package:
(1) 25kg net weight paper bag with one PE liner
(2) 25kg net weight big woven bag with two PE liners
(3) 25kg net weight fiber drum with one PE liner
(4) 1000kg net weight big woven bag with one PE liner

Transportation:
Road/Rail transport: GGVS, GGVE, ADR, RID: CLASS 5.1
Sea transport: GGV See/IMDG code: CLASS 5.1 Page 5185, UN no.1505
Water hazards class 1 (slight water hazard)