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Iron oxide black

CAS No.: 1309-38-2

Formula: Fe3O4

Molecular Weight: 231.53

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What is Iron oxide black

Iron oxide black, also known as magnetite or ferrous ferric oxide (Fe₃O₄), is a versatile and widely used inorganic pigment and material. Renowned for its deep black color, excellent opacity, and strong tinting strength, it is a popular choice in industries such as construction, coatings, plastics, and ceramics. Iron oxide black is highly stable, resistant to UV light, and non-toxic, making it suitable for both industrial and consumer applications. It is commonly used in concrete products, paints, magnetic inks, and even in electronics due to its magnetic properties. Its durability, eco-friendliness, and cost-effectiveness make it a preferred pigment for achieving long-lasting, high-quality black finishes.

Preparation Process: Iron oxide black (Fe₃O₄) can be prepared via the **coprecipitation method**: 1. Dissolve **ferrous sulfate (FeSO₄·7H₂O)** and **ferric chloride (FeCl₃)** in a 1:2 molar ratio in deoxygenated water under nitrogen to prevent oxidation. 2. Heat the solution to 60–80°C and add **sodium hydroxide (NaOH)** dropwise with vigorous stirring until pH 10–12 is reached, forming a black precipitate. 3. Maintain the temperature for 1–2 hours to ensure complete reaction. 4. Filter, wash the precipitate with deionized water to remove impurities, and dry at 80–100°C. Alternatively, **thermal decomposition** of iron(III) oxalate or reduction of hematite (Fe₂O₃) under hydrogen can also yield Fe₃O₄.

Usage Scenarios: Iron oxide black (Fe3O4) is widely used as a pigment in coatings, paints, and construction materials due to its deep black color and UV resistance. It enhances durability in concrete, tiles, and asphalt. In electronics, it serves in magnetic inks, toners, and recording media. The compound acts as a catalyst in chemical reactions, including ammonia synthesis and wastewater treatment. It is employed in cosmetics, such as eyeliners and mascaras, for its non-toxic properties. Additionally, iron oxide black is utilized in medicine for drug delivery and MRI contrast agents. Its thermal stability makes it suitable for high-temperature applications, including protective coatings and ceramics.

Iron oxide black Basic Info

Chemical Name Iron oxide black

Synonyms h3s;kn320;rb-bl;E 172;ept500;ironblack;MAGNETITE;11557black;meramecm25;blackironbm

CAS No. 1309-38-2

Molecular Formula Fe3O4

Molecular Weight 231.53

PSA -

LogP -

Safely Info

RTECS -

Hazard Class -

Safety Statements 26-36/37/39

HS Code -

WGK Germany -

Packing Group -

RIDADR -

Risk Statements 36/37/38

Hazard Codes Xi

Caution Statement P264-P270-P301+P312-P330-P501

Hazard Declaration H302

Symbol GHS07

Signal Word Warning

Iron oxide black Price

Here is a rough price range for Iron Oxide Black in the listed countries. Note that prices can vary based on quality, quantity, and market conditions:

1. **United States**: $0.50 - $2.00 per kg
2. **China**: $0.30 - $1.50 per kg
3. **Russia**: $0.40 - $1.80 per kg
4. **Germany**: $0.60 - $2.20 per kg
5. **India**: $0.25 - $1.20 per kg
6. **Japan**: $0.70 - $2.50 per kg
7. **Brazil**: $0.50 - $1.80 per kg
8. **South Korea**: $0.60 - $2.00 per kg
9. **Philippines**: $0.40 - $1.50 per kg
10. **United Kingdom**: $0.70 - $2.30 per kg
11. **France**: $0.65 - $2.20 per kg
12. **Mexico**: $0.45 - $1.70 per kg
13. **Canada**: $0.55 - $2.10 per kg
14. **South Africa**: $0.35 - $1.60 per kg
15. **Egypt**: $0.30 - $1.40 per kg
16. **Turkey**: $0.40 - $1.70 per kg
17. **Thailand**: $0.35 - $1.50 per kg
18. **Indonesia**: $0.30 - $1.40 per kg

If no specific data is available for a country, it is marked as "No results." Prices are approximate and subject to change based on market conditions.