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Send EmailFerric Ammonium Sulfate, Ammonium Ferrric Sulphate, Iron Alum, Ferric Alum, 7783-83-7
AMMONIUM FERRIC SULFATE DODECAHYDRATE – AMONYUM DEMİR (III) SÜLFAT 12-HİDRAT
CAS Number: 7783-83-7
EC Number (EINECS): 232-097-0
Molecular Formula: NH₄Fe(SO₄)₂·12H₂O
Molecular Weight: 482.19 g/mol
Chemical Class: Inorganic iron salt (double salt / alum)
SECTION 1: CHEMICAL IDENTITY AND DEFINITION
| Parameter | Information |
|---|---|
| Chemical Name (IUPAC) | Ammonium iron(III) sulfate dodecahydrate |
| Other Names | Ferric Ammonium Sulfate, Iron Alum, Ferric Alum, Ammonium Ferric Sulfate, Demir Alum, Demir Şap |
| Chemical Formula | NH₄Fe(SO₄)₂·12H₂O |
| Molecular Weight | 482.19 g/mol |
| CAS Number | 7783-83-7 |
| EC Number (EINECS) | 232-097-0 |
| Chemical Class | Inorganic iron salt (double salt / alum) |
| Appearance | Pale violet to colorless, octahedral crystals |
| Odor | Odorless |
| Physical State (20°C) | Solid (crystalline) |
| Iron Valence | Fe³⁺ (iron(III)) |
| Iron Content | ~11.6% (Fe³⁺) |
SECTION 2: PHYSICAL PROPERTIES
| Property | Value |
|---|---|
| Appearance | Pale violet to colorless, octahedral crystals |
| Odor | Odorless |
| Molecular Weight | 482.19 g/mol |
| Density (20°C) | 1.71 g/cm³ |
| Melting Point | 100-110 °C (loses water) |
| Solubility in Water (20°C) | Highly soluble |
| Solubility in Ethanol | Slightly soluble |
| pH (5% solution) | 2.0 – 3.0 (acidic) |
| Crystal Water Content | ~44.8% (12 H₂O) |
| Iron Content | ~11.6% (Fe³⁺) |
| Hygroscopicity | Low |
SECTION 3: COMPARISON OF IRON AMMONIUM SULFATES
| Property | Ferric Ammonium Sulfate (NH₄Fe(SO₄)₂·12H₂O) | Ferrous Ammonium Sulfate (NH₄)₂Fe(SO₄)₂·6H₂O |
|---|---|---|
| CAS Number | 7783-83-7 | 7783-85-9 |
| Iron Valence | Fe³⁺ (Ferric) | Fe²⁺ (Ferrous) |
| Formula | NH₄Fe(SO₄)₂·12H₂O | (NH₄)₂Fe(SO₄)₂·6H₂O |
| Molecular Weight | 482.19 g/mol | 392.14 g/mol |
| Color | Pale violet | Blue-green |
| Common Name | Iron Alum, Ferric Alum | Mohr's Salt |
| Use | Mordant, coagulant, oxidant | Primary standard, reductant |
| pH | More acidic | Less acidic |
SECTION 4: CHEMICAL PROPERTIES
| Property | Information |
|---|---|
| Chemical Formula | NH₄Fe(SO₄)₂·12H₂O |
| Molecular Weight | 482.19 g/mol |
| Chemical Class | Inorganic iron salt (double salt / alum) |
| Structure | Double salt of NH₄₂SO₄ and Fe₂(SO₄)₃ |
| Iron Valence | Fe³⁺ (+3) |
| Oxidation State | Already oxidized (stable) |
| pH (5% solution) | 2.0 – 3.0 (acidic) |
| Stability | Stable under normal storage conditions |
| Thermal Decomposition | Loses water at 100-110°C; decomposes above 250°C |
| Hygroscopicity | Low |
| Incompatible Materials | Strong oxidizing agents, strong bases, reducing agents |
Chemical Structure:
NH₄Fe(SO₄)₂·12H₂O
Ammonium Iron(III) Sulfate Dodecahydrate
(Iron Alum / Ferric Alum)
SECTION 5: APPLICATION AREAS
5.1. Analytical Chemistry
| Application | Function |
|---|---|
| Standard Iron Solution | Fe³⁺ standard solutions for spectrophotometry |
| Reagent | Various analytical procedures |
| Colorimetric Analysis | Iron determination methods |
| Titration | Redox titrations (oxidizing agent) |
5.2. Laboratory Reagent
| Application | Function |
|---|---|
| Chemical Synthesis | As reagent and catalyst |
| Precipitation Agent | Precipitation reactions |
| pH Adjustment | Acidic buffer preparation |
5.3. Water Treatment
| Application | Function |
|---|---|
| Coagulant | Water and wastewater treatment |
| Flocculant | Removes suspended particles |
| Phosphate Removal | Removes phosphates from wastewater |
5.4. Textile and Dyeing Industry
| Application | Function |
|---|---|
| Mordant | Fixes dyes to fabrics |
| Dyeing Aid | Improves color fastness |
| Printing | Textile printing applications |
5.5. Pigments and Inks
| Application | Function |
|---|---|
| Pigment Production | Iron oxide pigments |
| Inks | Special ink formulations |
| Paints | Paint formulations |
5.6. Agriculture
| Application | Function |
|---|---|
| Fertilizer | Iron source for plants |
| Soil Amendment | Corrects iron deficiency in soil |
| Micronutrient | Iron supplementation for crops |
SECTION 6: QUALITY SPECIFICATIONS (ANALYTICAL GRADE)
| Parameter | Specification (ACS / USP / Ph. Eur.) |
|---|---|
| Appearance | Pale violet to colorless, octahedral crystals |
| Identification | Positive (Iron, Ammonium and Sulfate tests) |
| Assay (Fe) | 11.0 – 12.0% |
| Loss on Drying | 42.0 – 46.0% |
| pH (5% solution) | 2.0 – 3.0 |
| Chlorides (Cl) | ≤ 0.001% |
| Nitrates (NO₃) | ≤ 0.01% |
| Heavy Metals (as Pb) | ≤ 10 ppm |
| Lead (Pb) | ≤ 2 ppm |
| Arsenic (As) | ≤ 3 ppm |
| Mercury (Hg) | ≤ 1 ppm |
| Copper (Cu) | ≤ 0.005% |
| Zinc (Zn) | ≤ 0.005% |
| Manganese (Mn) | ≤ 0.005% |
| Water Insoluble | ≤ 0.01% |
| Alkali and Alkaline Earth Metals | ≤ 0.02% |
SECTION 7: STORAGE AND SHELF LIFE
| Parameter | Information |
|---|---|
| Storage Conditions | Cool (15-25°C), dry, well-ventilated area |
| Container Requirements | Tightly closed, original packaging |
| Protect From | Light, moisture, strong reducing agents |
| Shelf Life | 24-48 months (unopened original packaging) |
| Stability Note | Stable; does not oxidize (already Fe³⁺) |
SECTION 8: PACKAGING OPTIONS
| Packaging Type | Quantity | Material |
|---|---|---|
| Plastic pail | 20-25 kg | HDPE |
| PE-lined kraft paper bag | 25 kg | Kraft paper + PE |
| Fiber drum | 25-50 kg | HDPE + PE |
| Glass bottle | 100-500 g | Amber glass |
| Aluminum foil bag | 1-5 kg | Laminated aluminum |
SECTION 9: SAFETY AND HEALTH INFORMATION
GHS Classification (Bulk Powder)
| Hazard Class | Category |
|---|---|
| Acute Toxicity (Oral) | Category 4 (H302) |
| Skin Irritation | Category 2 (H315) |
| Eye Irritation | Category 2A (H319) |
| Signal Word | Warning |
Hazard Statements (H-Codes)
| Code | Statement |
|---|---|
| H302 | Harmful if swallowed |
| H315 | Causes skin irritation |
| H319 | Causes serious eye irritation |
Precautionary Statements (P-Codes)
| Code | Statement |
|---|---|
| P261 | Avoid breathing dust |
| P280 | Wear protective gloves/eye protection |
| P301+P312 | IF SWALLOWED: Call a POISON CENTER/doctor if you feel unwell |
| P302+P352 | IF ON SKIN: Wash with plenty of soap and water |
| P305+P351+P338 | IF IN EYES: Rinse cautiously with water for several minutes; remove contact lenses if present and easy to do; continue rinsing |
SECTION 10: TOXICOLOGICAL INFORMATION
| Parameter | Value |
|---|---|
| Oral LD50 (Rat) | > 500 mg/kg |
| Skin Irritation | Irritant |
| Eye Irritation | Irritant |
| Carcinogenicity | Not classified |
| Mutagenicity | Negative in standard tests |
| Target Organs | Skin, eyes, respiratory system |
SECTION 11: FIRST AID MEASURES
| Exposure Route | Action |
|---|---|
| Inhalation | Move to fresh air. If respiratory irritation persists, seek medical attention. |
| Skin Contact | Wash with plenty of soap and water. Remove contaminated clothing. |
| Eye Contact | Rinse immediately with plenty of water for at least 15 minutes. Seek medical attention. |
| Ingestion | Rinse mouth. Do not induce vomiting. Seek medical attention. |
SECTION 12: REGULATORY STATUS
| Region / Authority | Status |
|---|---|
| European Union | REACH registered |
| USA (FDA) | Limited use as iron source |
| Turkey | Registered; subject to KKDİK regulations |
SECTION 13: TRANSPORT INFORMATION
| Parameter | Information |
|---|---|
| UN Number | Not regulated (not dangerous goods) |
| Hazard Class | Not applicable |
| Packing Group | Not applicable |
| ADR/RID | Not regulated |
| IMDG Code | Not regulated |
| IATA (Air) | Not regulated |
| Marine Pollutant | No |
SECTION 14: FIRE-FIGHTING MEASURES
| Parameter | Information |
|---|---|
| Fire Hazard | Non-combustible (inorganic salt) |
| Suitable Extinguishing Media | Water spray (mist), CO₂, dry chemical powder |
| Specific Hazards | When heated, emits toxic fumes (sulfur oxides, nitrogen oxides) |
| Decomposition Products | SOx, NOx, Fe₂O₃ |
| Protective Equipment | Self-contained breathing apparatus (SCBA), full protective clothing |
SECTION 15: ACCIDENTAL SPILLAGE AND CLEANUP
| Parameter | Information |
|---|---|
| Personal Protection | Nitrile gloves, protective goggles, dust mask (N95) |
| Cleaning Methods | Collect mechanically (sweep or spatula) |
| Environmental Precautions | Prevent entry into drains, soil, and surface waters |
| Waste Disposal | According to local regulations; landfilling at licensed facilities |
SECTION 16: OTHER NAMES AND SYNONYMS
| Type | Name |
|---|---|
| Turkish Names | Amonyum Demir (III) Sülfat, Demir Alum, Demir Şap |
| English Names | Ammonium Ferric Sulfate, Ferric Ammonium Sulfate, Iron Alum, Ferric Alum |
| Chemical Names | Ammonium iron(III) sulfate dodecahydrate, Ammonium ferric alum |
| CAS Number | 7783-83-7 |
| EC Number | 232-097-0 |
SECTION 17: SUMMARY AND CRITICAL NOTES
Product Summary
| Parameter | Value |
|---|---|
| Product | Ammonium Ferric Sulfate Dodecahydrate |
| CAS Number | 7783-83-7 |
| Appearance | Pale violet to colorless, octahedral crystals |
| Molecular Weight | 482.19 g/mol |
| Primary Function | Laboratory reagent, coagulant, mordant |
| Iron Content | ~11.6% (Fe³⁺) |
Critical Notes
-
Iron Alum: Also known as ferric alum or iron alum; widely used as a mordant in dyeing.
-
Ferric (Fe³⁺): Contains iron in the +3 oxidation state; already oxidized, does not oxidize further.
-
Double Salt: Composed of ammonium sulfate and ferric sulfate.
-
Dodecahydrate: Contains 12 molecules of crystal water (~44.8%).
-
Acidic Solution: 5% solution has pH 2.0-3.0; acidic properties.
-
Coagulant: Used in water treatment as a coagulant and flocculant.
-
Mordant: Fixes dyes to fabrics in textile industry.
-
Stable: Does not oxidize (unlike ferrous salts); long shelf life.
-
High Solubility: Highly soluble in water; slightly soluble in ethanol.
-
Distinguish from Mohr's Salt: Different from ferrous ammonium sulfate (Mohr's salt) which contains Fe²⁺.
IMPORTANT DECLARATION: This Technical Data Sheet (TDS) is for informational purposes only and has been prepared based on available technical data. The user is responsible for determining the product's suitability for their specific application and for complying with all local, national, and international regulations. For complete safety, storage, use, transport, waste, and regulatory compliance information, refer to the official Safety Data Sheet (SDS/MSDS) provided by the manufacturer/supplier.
