Aluminium Potassium Sulfate is also known as potassium aluminium sulfate or potash alum. It is an inorganic double sulfate composed of potassium, aluminium, and sulfate ions with the chemical formula KAl(SO₄)₂. It is most commonly encountered in its dodecahydrate form, KAl(SO₄)₂·12H₂O, and forms large, transparent aluminium potassium sulfate crystals. The compound belongs to the alum family and crystallizes in an octahedral structure in neutral solution and a cubic structure in alkaline solution. It is a stable inorganic salt with a 1:1:2 ratio of potassium, aluminium and sulfate ions. It is known for its astringent, mordant and flame-retardant properties.
CAS No.: 10043-67-1, 7784-24-9Â
Synonyms: Potassium alum sulfate, Potash alum, Alum-(K)
| Physical Properties | |
| Chemical formula | AlK(SOâ‚„)â‚‚ |
| IUPAC Name | Potassium alum |
| Molecular weight | 258.192Â g/mol |
| Solubility | Soluble in water |
| Density | 1.725 g/cm3 |
| Storage | Store at room temperature |
| Chemical Properties | |
| Color | White |
| Physical State | Solid |
| Melting Point | 92 to 95 °C |
| Boiling Point | 330°C |
| Odor | Watery metallic |
| Pictograms : | No information available |
| Hazard Statements : | No information available |
| Precautionary statements : | No information available |
Aluminium Potassium Sulfate is also known as potassium aluminium sulfate or potash alum. It is an inorganic double sulfate composed of potassium, aluminium, and sulfate ions with the chemical formula KAl(SO₄)₂. It is most commonly encountered in its dodecahydrate form, KAl(SO₄)₂·12H₂O, and forms large, transparent aluminium potassium sulfate crystals. The compound belongs to the alum family and crystallizes in an octahedral structure in neutral solution and a cubic structure in alkaline solution. It is a stable inorganic salt with a 1:1:2 ratio of potassium, aluminium and sulfate ions. It is known for its astringent, mordant and flame-retardant properties.
CAS No.: 10043-67-1, 7784-24-9Â
Synonyms: Potassium alum sulfate, Potash alum, Alum-(K)
| Physical Properties | |
| Chemical formula | AlK(SOâ‚„)â‚‚ |
| IUPAC Name | Potassium alum |
| Molecular weight | 258.192Â g/mol |
| Solubility | Soluble in water |
| Density | 1.725 g/cm3 |
| Storage | Store at room temperature |
| Chemical Properties | |
| Color | White |
| Physical State | Solid |
| Melting Point | 92 to 95 °C |
| Boiling Point | 330°C |
| Odor | Watery metallic |
| Pictograms : | No information available |
| Hazard Statements : | No information available |
| Precautionary statements : | No information available |
Aluminium potassium sulphate is used for water purification, textile dyeing, leather tanning, biological staining, pharmaceuticals, cosmetics and laboratory research.
It is commonly known as potassium aluminium sulfate, potassium alum, or simply alum.
Aluminium sulfate contains only aluminium and sulfate ions, while potassium aluminium sulfate is a double sulfate containing potassium, aluminium, and sulfate ions. Both rely on the aluminum ion to perform tasks, but their varying chemical structures make them suited for very different applications. The latter is extensively used as alum in research and industrial applications.Â
Aluminium potassium sulfate crystals are transparent crystalline forms of potassium alum, most commonly found as the stable dodecahydrate (KAl(SO₄)₂·12H₂O).
Aluminium potassium sulphate is a mordant which increases the affinity of the dye to the tissue components, thus giving better and more stable staining results.
