| Identification | |
| Name: | Ferrous ammonium sulfate |
| Synonyms: | Diammonium iron bis(sulphate) |
| CAS: | 10045-89-3 |
| EINECS: | 233-151-8 |
| Molecular Formula: | Fe?(NH4)2?(SO4)2 |
| Molecular Weight: | 284.04712 |
| InChI: | InChI=1S/Fe.2H3N.2H2O4S/c;;;2*1-5(2,3)4/h;2*1H3;2*(H2,1,2,3,4)/q+2;;;;/p-2 |
| Molecular Structure: |  |
| Properties | |
| Transport: | UN 2796 |
| Density: | g/cm3 |
| Water Solubility: | 26.9 g/100cc water @ 20C (68F) |
| Solubility: | 26.9 g/100cc water @ 20C (68F) |
| Appearance: | Pale blue-green crystals. |
| Specification: |
Ferrous ammonium sulphate (10045-89-3) is a double salt of iron sulfate and ammonium sulfate, and also can be called Mohr's Salt ; Ammonium iron sulfate ; Diammonium ferrous sulfate ; Diammonium iron sulfate ;and Ammonium ferrous sulfate .It is preferred over iron(II) sulfate for titration purposes as it is much less affected by oxygen in the air than iron(II) sulfate, solutions of which tend to oxidise to iron(III).The ammonium ions make solutions of Mohr's salt slightly acidic, which prevents this oxidation from occurring. The presence of protons keeps this equilibrium to the left, the Fe(II) side.The relevant equation for this is: |
| Safety Data | |
| Hazard Symbols |
C:Corrosive
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