Ammonium persulfate
General Product Information
| Article | Ammonium persulfate |
| Synonyms | Ammonium peroxydisulfate |
| CAS No. | 7727-54-0 |
| EEG No. | – |
| EINECS No. | 231-786-5 |
| IMO | Class 5.1 |
| Tariff Code | 28334000 |
| UN No. | 1444 |
| VLG/ADR | Class 5.1, Packing Group iii |
Description
Ammonium persulfate is a white, crystalline inorganic salt. It is a powerful oxidizing agent widely used in industrial Applications, particularly as an initiator for polymerization processes. Because of its stability in the dry state and active action in solution, it is widely used in sectors such as chemicals, electronics, textiles, Cosmetics and Water Treatment.
Characteristics
- Odor: Odorless.
- Hygroscopic: –
- Color: White.
- Grade: Technical.
- Solubility: Soluble in water.
- Shape: Crystalline powder.
Physical & Chemical Properties
| Chemical Structure | (NH4)2S2O8 |
| Molar Weight | 228.20 g/mol |
| Melting Point | Approx. 120 °C (decomposes). |
| Boiling Point | – |
| Density | – |
| Refractive Index | – |
| pH | Approx. 4 (at 5% solution). |
Applications
Ammonium persulfate is applied in various ways, for instance:
1. Electronics Industry
As a copper etchant at the production of printed circuit boards (PCBs).
2. Cosmetic Industry
In hair bleaching products, often in combination with hydrogen peroxide.
3. Plastics & Rubber Industry
As an initiator for the radical polymerization of monomers such as acrylates, styrene and butadiene.
4. Water Treatment
For oxidative degradation of organic contaminants and odorants.
5. Textile Industry
For bleaching and pretreatment of fabrics and yarns.
Interessing Links
- CAS Common Chemistry – Ammonium Persulfate
- European Chemicals Agency (ECHA) – For chemical information and regulations.
- PubChem – Ammonium Persulfate – Chemical information by the National Library of Medicine of the National Center for Biotechnology Information (NIH-NCBI).
- Wikipedia – Ammonium persulfate