Aluminium Ammonium Sulphate Dodecahydrate 99.5% AR / CAS 7784-26-1
Aluminium Ammonium Sulphate Dodecahydrate, also known as ammonium alum, is a white crystalline analytical reagent.
| CAS No. | 7784-26-1 |
|---|---|
| Molecular Formula | NH4Al(SO4)2�12H2O |
| Molecular Weight | 453.32 g/mol |
| Shelf Life | 5 years |
| Appearance | White crystalline powder |
| Purity | 99.5% (product grade) |
| Grade | AR |
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Product Details
Aluminium Ammonium Sulphate Dodecahydrate, also known as ammonium alum, is an AR-grade white crystalline powder supplied in a 500 g pack.
Product specifications
| CAS No. | 7784-26-1 |
|---|---|
| Article No. | A-00483 |
| HSN Code | 28333010 |
| Purity | 99.5% (product grade) |
| Grade | AR |
| Molecular Formula | NH4Al(SO4)2�12H2O |
| Molecular Weight | 453.32 g/mol |
| Appearance | White crystalline powder |
| Melting Point | 93.5�C |
| Boiling Point | 280�C |
| Water Solubility | 14% in water |
| Assay | Min. 98% (as listed in the specification) |
| Insoluble Matter | Listed as min. 0.005% |
| Silicate (SiO3) | Max. 0.002% |
| Chloride (Cl) | Max. 0.002% |
| Nitrate (NO3) | Max. 0.001% |
| Phosphate (PO4) | Max. 0.0025% |
| Arsenic (As) | Max. 0.00005% and max. 0.003% (both listed) |
| Copper (Cu) | Max. 0.0005% |
| Lead (as Pb) | Max. 0.001% |
| Potassium (K) | Max. 0.05% |
| Iron (Fe) | Max. 0.001% |
| Sodium (Na) | Max. 0.01% |
| Calcium (Ca) | Max. 0.05% |
| Shelf Life | 5 years |
| Available Pack Size | 500 g |
Applications
Used in laboratory studies of alum crystallization and crystal growth. Ammonium alum also has established uses as a mordant and as a clarifying agent in water treatment.