Ammonium Per Sulfate
Ammonium Persulfate, APS, (NH4)2S2O8
- CAS
- 7727-54-0
- EC
- 231-786-5
- Sectors
- Plastics & Polymers, Electronics & Solar PV, Textiles, Leather & Paper
Ammonium Per Sulfate (CAS 7727-54-0) is a strong oxidizing agent supplied as a white to yellow crystalline powder, used as a polymerization initiator for acrylic resins and synthetic rubber, a desizing and bleaching agent in textile processing, and a micro-etching agent for printed circuit boards. It is essential for the production of acrylic resins and synthetic rubber compounds.
In the textile industry, it serves as a high-performance desizing agent and bleach booster. Its strong oxidation potential allows for the rapid removal of starch and impurities from fibers.
This chemical is also widely used in electronics manufacturing for etching printed circuit boards (PCBs). It ensures high precision and clean surfaces during the metal removal process.
Typical Properties
| Molecular formula | H3N.1/2H2O8S2 |
|---|---|
| Molecular weight | 228.2 g/mol |
| Appearance | Ammonium persulfate is a colorless or white crystalline solid. |
| Form | powder |
| Color | White to yellow |
| Odor | Odorless |
| Melting point | 187 °C (monoclinic crystal) (decomp) |
| Density | 1.9 g/cm³ |
| Water solubility | 582 g/L (20 °C) decomposes |
| pH | 1.0-2.5 (25°C, 1M in H2O) |
| GHS signal word | Danger · Oxidizing, Irritant / harmful, Health hazard |
| HS code | 28334000 |
| Grades available | Technical Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Ammonium Per Sulfate
Applications
- Polymerization Initiator: Triggers the free radical polymerization of monomers in emulsion and solution processes.
- PCB Etching: Acts as a micro-etching agent to clean and prepare copper surfaces in electronics.
- Bleaching Agent: Used in hair cosmetics and textile processing to whiten and decolorize substrates.
Safety & Risks
Classified as Oxidizer (Class 5.1) and Sensitizer. It can cause allergic skin reactions. Use full PPE, including respirators, chemical-resistant gloves, and face shields.
Packaging
25kg moisture-proof PE bags and fiber drums.