Ferrous ammonium sulfate
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Description
Pale green-blue crystals that slowly oxidize and effloresce in the presence of light and air. Known as Mohr's salt, ferrous ammonium sulfate is used as a primary standard in quantitative analysis. It is also used in photographic solutions and in Dosimeter badges.
Synonyms and Related Terms
Mohr's salt; ammonium ferrous sulfate; iron ammonium sulfate; ferrous ammonium sulphate (Br.); ammonium iron (II) sulfate
Risks
- Contact may cause irritation.
- May decompose in light.
- Fisher Scientific: SDS
Physical and Chemical Properties
Soluble in water. Insoluble in ethanol. Deliquesces in air.
| Composition | FeSO4(NH4)2SO4.6H2O |
|---|---|
| CAS | 10045-89-3 |
| Melting Point | 100-110 C (d) |
| Density | 1.86 g/ml |
| Molecular Weight | mol. wt. = 392.13 |
Resources and Citations
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- Susan E. Schur, Conservation Terminology: A review of Past & Current Nomenclature of Materials, Technology and Conservation, Spring (p.34-39); Summer (p.35-38); Fall (p.25-36), 1985