Ammonium alum ;Ammonium Aluminium Sulphate
| CAS | 7784-26-1 |
| Molecular Formula | NH4AI(SO4)2.12H2O |
| Molecular Weight | 453.32 |
| Shelf Life | 60 Months |
| Physical Properties | |||
| Physical State at 20 °C | Solid | Colour | White powder |
| Odour | Odorless | pH Value | 2.6 |
| Melting Point/ Freezing Point [°C] | 93.5 °C | Boiling Point [°C] | 280°C |
| Density [g/cm3] | 1.65 | Solubility in Water [% weight] | 14% in water |
| Specifications | |||
| Appearance | White crystalline powder | Assay (Complexometric) | Min 98.0% |
| Chloride (Cl) | Max 0.005% | Heavy Metal (As Pb) | Max 0.005% |
| Arsenic (As) | Max 0.003% | Iron (Fe) | Max 0.001% |
| Substance Not Precepitate By Nh3 (As So4) | Max 0.3% | ||
| Dangerous Goods Information | |||
| UN Number | – | DG Class | – |
| Safety Information & Hazard Symbols | |
| Symbol | GHS07 |
| Signal Word | Warning |
| Hazard Statement | H315-H319-H335 |
| Precaution Statement | P261-P305 + P351 + P338 |
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