Ammonium ferrous sulfate hexahydrate
【Another name】Ferrous ammonium alum; Low iron vitriol; Mohr's salt; Moore salt; Martians salt.
【Description】Pale blue-green crystals or particles, relative density 1.864, light sensitive, gradually weathering and oxidizing in air. Decompose at about 100-110℃, soluble in water, insoluble in alcohol.
| Test item | AR | CP | Other |
| Assay[(NH4)2Fe(SO4)2•6H2O] /% | ≥99.5 | ≥99.0 | Custom |
| pH(50g/L,25℃) | 3.0-5.0 | 3.0-5.0 | |
| Water insoluble /% | ≤0.005 | ≤0.02 | |
| Chloride(Cl) /% | ≤0.001 | ≤0.005 | |
| Phosphate(PO4) /% | ≤0.000 5 | ≤0.002 | |
| Manganese(Mn) /% | ≤0.05 | - | |
| Ferric iron(Fe3+) /% | ≤0.01 | ≤0.02 | |
| Copper(Cu) /% | ≤0.002 | ≤0.01 | |
| Zinc(Zn) /% | ≤0.003 | ≤0.02 | |
| Lead(Pb) /% | ≤0.002 | ≤0.004 | |
| Ammonia water does not precipitate (as SO4) /% | ≤0.1 | ≤0.2 |
【Use】Used for analytical reagents, such as preparation of ferrous ion standard solution; Also used as polymerization catalyst; Can be used as water purification agent; Raw materials for the preparation of other iron compounds, such as iron oxide pigments, magnetic materials, yellow blood salts and other iron salts; Can be used as a mordant in printing and dyeing industry; Used for tanning leather in the leather industry; Used as an antiseptic in the wood industry.