Potassium alum sulfate 12AQ
General Product Information
| Article | Potassium alum sulfate 12AQ |
| Synonyms | Potassium alum sulfate dodecahydrate, Potassium alum, Potash alum |
| CAS No. | 7784-24-9 |
| EEG No. | – |
| EINECS No. | 233-141-3 |
| IMO | – |
| Tariff Code | 28333000 |
| UN No. | – |
| VLG/ADR | – |
Description
Potassium alum sulfate dodecahydrate is a clear, white to Colorless crystalline salt belonging to the group of alums. Soluble in water, potassium alum is often used for its coagulation, fixation and preservation properties. It is used industrially in a wide range of industries, from water treatment to cosmetics.
Characteristics
- Odor: Odorless.
- Hygroscopic: –
- Color: White to Colorless.
- Grade: Technical.
- Solubility: Soluble in water.
- Shape: Crystalline powder.
Physical & Chemical Properties
| Chemical Structure | KAl(SO4)2-12H2O |
| Molar Weight | Approx. 474.39 g/mol |
| Melting Point | Approx. 92 °C (begins to decompose) |
| Boiling Point | – |
| Density | Approx. 1.75 g/cm³. |
| Refractive Index | – |
| pH | 3.0 – 3.5 (on 1% solution) |
Applications
Potassium alum sulfate is applied in various ways, for instance:
1. Textile & Leather Industry
Potassium alum serves as a fixative or mordant at dyeing fabrics. This improves the adhesion of dyes and increases color fastness.
2. Paper Industry
It helps at fixing inks and increases the water resistance of paper.
3. Water Treatment
It is used as a coagulant in drinking water and wastewater treatment plants. It causes suspended solids to clump together, facilitating their removal.
4. Other Applications
Potassium alum is also used at pigment production, in fire retardant applications and in some laboratory processes.
Interessing Links
- CAS Common Chemistry – Aluminum potassium sulfate dodecahydrate
- European Chemicals Agency (ECHA) – For chemical information and regulations.
- PubChem – Aluminum potassium sulfate dodecahydrate – Chemical information by the National Library of Medicine of the National Center for Biotechnology Information (NIH-NCBI).
- Wikipedia – Potassium alum