1. Product Description
Ferric Ammonium Sulfate (FAS) is a dark red to purple crystalline solid that is highly soluble in water. It is widely used in analytical chemistry (standard solutions, titrations), dyeing and tanning, water treatment, and pharmaceutical formulations. FAS serves as a stable source of ferric ions and ammonium sulfate in a single compound.
2. Specifications
| Parameter | Specification |
|---|
| Appearance | Dark red to purple crystalline solid |
| Assay (as Fe) | 16.0 – 17.5 % |
| Ferric Ion (Fe³⁺) | Pass test |
| Ammonium (NH₄⁺) | Pass test |
| Loss on Drying (105 °C, 2 h) | ≤ 12 % |
| Water Soluble | ≥ 98 % |
| Chloride (Cl⁻) | ≤ 0.05 % |
| Sulfate (SO₄²⁻) | Pass test |
| Heavy Metals (as Pb) | ≤ 10 ppm |
| Iron Impurities (other than Fe³⁺) | ≤ 0.05 % |
| Microbiological Limits | Not typically specified for lab grade; for pharma grade: TPC ≤ 1000 cfu/g, Yeast & Mold ≤ 100 cfu/g, E. coli negative |
3. Applications
Analytical Chemistry: Standard solution preparation, redox titrations
Pharmaceuticals: Component in iron supplements and antiseptics
Water Treatment: Coagulant and flocculant
Dyeing & Tanning: Mordant for fabrics and leather processing
Industrial: Catalysts, chemical reagents
4. Physical & Chemical Properties
| Property | Value |
|---|
| Appearance | Dark red to purple crystalline powder or crystals |
| Odor | Odorless |
| Taste | Astringent, slightly metallic |
| Solubility | Soluble in water; practically insoluble in alcohol |
| Density | 1.76 g/cm³ (bulk) |
| Melting Point | Decomposes at ~93 °C |
| Stability | Stable under dry conditions; hygroscopic; avoid strong oxidizers |
5. Storage & Handling
Store in a cool, dry, and ventilated area, away from moisture and sunlight.
Keep container tightly sealed.
Handle with gloves and avoid inhalation of dust.
Shelf life: 24 months under recommended storage conditions.
6. Packaging
| Grade | Standard Packaging |
|---|
| Laboratory / Industrial Grade | 25 kg fiber drum, multi-layer kraft bag, or HDPE drum |
| Pharmaceutical Grade | 1–25 kg sealed polyethylene/aluminum bags or drums |
7. Safety Information
Hazard Classification: Irritant to skin and eyes; may cause mild respiratory irritation if inhaled.
Handling: Avoid dust; wear protective gloves, goggles, and mask.
Environmental: Non-volatile; rinse small spills with plenty of water; avoid release into waterways in large
amounts.
For more information, please visit this website：https://www.khonorchem.com
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