Product Overview
Ferric Ammonium Sulfate, Reagent ACS
Molecular Formula: FeH4NO8S2•12H2O
CAS Number: 7783-83-7
Ferric ammonium sulfate dodecahydrate is often employed as an analytical standard, and has been used in a variety of other applications from nanomaterials to general redox reactions. This product is much less affected by oxygen in the air than iron(II) sulfate, making it more desirable for titration purposes, where iron(II) might be oxidized to iron(III). The oxidation of iron(II) to iron(III) is pH dependent, and the reaction occurs more rapidly at higher pH; this product lowers the pH of solutions slightly, thereby preventing oxidation from occurring.
Synonyms: Ammonium Iron (III) Sulfate
| TEST | MIN | MAX |
|---|---|---|
| ASSAY [NH4Fe(SO4)2•12H2O] | 98.5 - 102.0 % | |
| INSOLUBLE MATTER | 0.01 % | |
| CHLORIDE (Cl) | 0.001 % | |
| NITRATE (NO3) | 0.01 % | |
| CALCIUM (Ca) | 0.01 % | |
| COPPER (Cu) | 0.003 % | |
| MAGNESIUM (Mg) | 0.005 % | |
| POTASSIUM (K) | 0.005 % | |
| SODIUM (Na) | 0.02 % | |
| ZINC (Zn) | 0.003 % | |
| FERROUS IRON (Fe o) | TO PASS TEST(limitabout 0.001 %) |
Shipping Information
Tariff No. 2833300000
Storage Information
LIGHT SENSITIVE, MOISTURE SENSITIVE: Keep tightly closed in light-resistant containers
