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Iron Oxide Black

  • Iron Oxide Black
  • Iron Oxide Black
  • Iron Oxide Black
Краткое описание:

It is a commonly used magnetic material, and special pure ferric oxide is used as a raw material for recording tapes and telecommunication equipment, natural magnetite is a raw material for iron making, and is used to make primer and topcoat.

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ПРЕД.:Оксид железа КоричневыйСЛЕД.: Iron Oxide Yellow
Параметры продукта
Iron Oxide Black

Type

Fe2O3

Oil Absorption

Res. on
325 mesh

Water
Sol .salts

Moisture

PH value

Density 

Particle Shape

Compared with std

Tinting Strength
（%） (g/100g） （%） （%） （%） （g/cm） （%）
740 ≥93 15-25 ≤0.4 ≤0.5 ≤1.0 5-8 0.8-1.2 Spherical ≤1 95-105
750 ≥95 15-25 ≤0.4 ≤0.5 ≤1.0 5-8 0.8-1.2 Spherical ≤1 95-105
723 ≥92 15-25 ≤0.4 ≤0.5 ≤1.0 5-8 0.8-1.2 Spherical ≤1 95-105
790 ≥92 15-25 ≤0.4 ≤0.5 ≤1.0 5-8 0.8-1.2 Spherical ≤1 95-105
9675 20-45 ≤1.0 ≤1.0 ≤1.5 5-8 0.2-0.4 Acicular ≤1 110-130
Hs50 20-45 ≤1.0 ≤1.0 ≤1.5 5-8 0.2-0.4 Acicular ≤1 110-130
FE3O4 INDUSTRIAL SERIES

Black Oxide Powder

Iron Oxide Black Fe3O4 CAS 1317-61-9 E172 Food Grade
CHEMICAL PROFILE

What Is Black Oxide Powder?

Iron Oxide Black Powder is an inorganic black pigment with the chemical formula Fe₃O₄ (CAS 1317-61-9), commonly referred to as Black Iron Oxide Fe3O4. It is produced through controlled precipitation or calcination processes, resulting in a fine, free-flowing powder with uniform particle size distribution and a stable spinel crystal structure.

Black Oxide Powder delivers strong tinting strength, consistent opacity, and reliable lightfastness — properties that make it suitable for demanding outdoor and industrial environments. Unlike organic black pigments, it contains no polycyclic aromatic hydrocarbons (PAHs), which positions it for compliance with international safety standards including the EU E172 food-grade classification.

The product line covers multiple grades — including Iron Oxide Black 318, Iron Oxide Black 330, and Iron Oxide Black 722 — each formulated to specific particle size ranges, surface area profiles, and end-use performance targets. Whether the application requires deep black color in concrete, corrosion-resistant industrial coatings, food-contact compliance, or ferrimagnetic functionality, a corresponding Black Iron Oxide Pigment grade is available.

Key Product Advantages

01
Chemical Stability
The Fe₃O₄ spinel structure resists acid/alkali attack, solvent migration, and heat deformation up to 300°C, maintaining color integrity throughout processing and service life.
02
Tinting Strength and Opacity
Iron Oxide Black Powder achieves deep, uniform black tones at low loading levels. Tinting strength indices range from 80% to 110% depending on grade.
03
Weatherfastness
Outdoor performance is sustained without hue shift, chalking, or fading under prolonged UV exposure — a requirement met by all grades of Iron Oxide Pigment Black.
04
Regulatory Compliance
Food- and pharma-grade batches meet EU Black Iron Oxide E172 specifications, with heavy metal content (As, Pb, Hg, Cd) controlled to levels approved by EFSA and FDA.
05
Multi-Grade Availability
Grades 318, 330, and 722 cover the full particle size spectrum from sub-0.3 µm to 1.0 µm, accommodating both fine-dispersion and high-loading applications.
06
Surface Treatment Options
Hydrophilic or hydrophobic surface treatment is available, enabling compatibility with both water-borne and solvent-borne systems.

Technical Specifications

The following table presents typical physicochemical parameters for Black Oxide Pigment Powder. Exact values vary by grade; certificates of analysis are available upon request.

Parameter
Iron Oxide Black 318
Iron Oxide Black 330
Iron Oxide Black 722
Fe₃O₄ Purity (%)
≥ 96
≥ 95
≥ 94
Particle Size D50 (µm)
0.1 – 0.3
0.3 – 0.6
0.6 – 1.0
BET Surface Area (m²/g)
15 – 20
8 – 15
6 – 10
Tinting Strength (%)
100 – 110
90 – 100
80 – 90
Oil Absorption (g/100g)
25 – 30
18 – 25
15 – 20
pH (10% slurry)
6.5 – 7.5
6.0 – 8.0
6.0 – 8.0
Heat Resistance (°C)
≤ 300
≤ 300
≤ 280
Moisture Content (%)
≤ 1.0
≤ 1.5
≤ 1.5
Typical values for Black Oxide Powder grades 318, 330, and 722. All data subject to batch variation; refer to Certificate of Analysis for confirmed values.

Application Areas

Construction
Black Oxide Pigment Powder is extensively used to color cement concrete, colored asphalt, paving tiles, artificial stone, and precast elements. Typical dosage ranges from 0.5% to 5% by dry weight. Its strong alkali resistance ensures color stability within the high-pH environment of cementitious systems, where many organic pigments would degrade.
Coatings
Iron Oxide Pigment Black is incorporated into anticorrosion primers, marine coatings, industrial topcoats, and architectural paints. Compared to carbon black, it disperses more uniformly, exhibits lower tendency to flocculate, and contributes mild rust-inhibiting properties through its iron oxide chemistry. Both Iron Oxide Black 318 (fine grades for color depth) and Iron Oxide Black 330 (balanced dispersion) are used depending on formulation requirements.
Plastics and Rubber
Black Iron Oxide Pigment performs reliably in polyolefins, PVC, ABS, and rubber compounds. Iron Oxide Black 722, with its larger particle size and lower oil absorption, is particularly suited to high-loading plastic and asphalt applications where cost efficiency is a factor. Thermal stability up to 280–300°C accommodates most standard injection molding and extrusion processes.
Food and Pharma E172
Black Iron Oxide E172 is approved by the European Food Safety Authority (EFSA) and is listed in EU Regulation (EC) No 1333/2008 as a permitted food coloring for specific applications such as olive surface coloring. In pharmaceuticals, it is used in tablet coatings and capsule printing inks. In cosmetics, Black Oxide Pigment appears in eye shadow, eyeliner, mascara, and nail color formulations, subject to EU Cosmetics Regulation (EC) No 1223/2009 and FDA 21 CFR compliance. Heavy metal limits — As ≤ 3 ppm, Pb ≤ 10 ppm, Hg ≤ 1 ppm — must be confirmed per applicable market regulations.
Magnetic Materials
The ferrimagnetic nature of Black Iron Oxide Fe3O4 enables its use in magnetic recording media, ferrite core premix, electromagnetic shielding coatings, and ferrofluid formulations. Specific surface area and particle size distribution are critical parameters for these applications; Iron Oxide Black 318 with its fine particle size and high BET surface area is typically selected for functional magnetic uses.

Grade Selection Guide

Selecting the appropriate Black Oxide Pigment grade depends primarily on particle size requirements, dispersion system type, loading level, and end-use performance criteria. The following guide outlines the typical selection logic:

A
Iron Oxide Black 318
Sub-0.3 µm particle size, highest tinting strength index (100–110%). Suited to applications requiring deep black intensity at low pigment loading — including high-performance coatings, color pastes, cosmetics, and magnetic functional materials.
B
Iron Oxide Black 330
Mid-range D50 (0.3–0.6 µm), balanced tinting strength and dispersion. The most widely specified grade for construction coloring, general-purpose paints, and industrial pigment dispersions.
C
Iron Oxide Black 722
Coarser particle size (0.6–1.0 µm), lower oil absorption, reduced cost per unit volume. Suited to asphalt, high-fill plastic compounds, and applications where tinting strength requirements are secondary to flow and loading efficiency.

Frequently Asked Questions

Why does Black Oxide Powder settle in water-borne coatings?
Sedimentation in aqueous systems is typically related to insufficient surface hydrophilicity or inadequate dispersion. Specifying a hydrophilic surface-treated grade of Iron Oxide Black Powder, combined with a polycarboxylate dispersant and grinding to a fineness of ≤ 20 µm (Hegman 6+), substantially improves settling resistance and shelf stability.
What causes grey undertone in concrete colored with Iron Oxide Black?
Grey undertone usually results from three factors: low pigment loading, high water-to-cement ratio diluting color development, or efflorescence (alkali migration to the surface). Using Iron Oxide Black 318 — the finer and higher-tinting-strength grade — at a dosage of ≥ 2% by cement weight, while controlling curing conditions to minimize free alkali movement, produces a more consistent deep black finish.
How is E172 compliance verified for food and pharmaceutical applications?
Black Iron Oxide E172 compliance is verified through batch-specific third-party test reports (SGS, Intertek, Bureau Veritas) confirming identity (Fe₃O₄ ≥ 94%), heavy metal content (As, Pb, Hg, Cd, Cr), water-soluble matter, and particle size. Suppliers should provide a Technical Data Sheet (TDS), Safety Data Sheet (SDS), and a Declaration of Conformity referencing the relevant EU or USP/NF monograph. Confirm that the product batch is manufactured under food-grade GMP conditions and is not simply a repackaged industrial-grade material.
How does Iron Oxide Black compare to carbon black in coatings?
Iron Oxide Pigment Black and carbon black both produce black colorations but differ significantly in performance profile. Carbon black typically delivers a deeper jetness (lower L* value) at very low loading levels (0.1–0.5%), but requires more intensive dispersion energy and is prone to flocculation in certain resin systems. Black Oxide Pigment is easier to disperse, provides greater formulation stability, contributes some anticorrosive function, and is available in food/cosmetic-compliant grades — capabilities that carbon black does not offer. For applications where absolute jetness is the sole criterion and cost is critical, carbon black may be selected; for industrial protection, building materials, or regulated industries, Iron Oxide Black Powder is generally the specified choice.
What are the storage and handling requirements?
Black Iron Oxide Pigment should be stored in sealed containers in a dry, ventilated environment below 40°C, away from moisture sources. Prolonged exposure to humidity can cause caking, which increases dispersion difficulty without affecting chemical properties. The product is classified as a non-hazardous solid under international transport regulations (not subject to IMDG, IATA DGR, or ADR restrictions). Standard moisture-proof packaging (paper bags with PE liner, or jumbo bags with inner PE film) is recommended for bulk shipments.

Packaging and Available Formats

Iron Oxide Black Powder is available in the following packaging configurations to accommodate laboratory sampling through full production-scale procurement:

25 kg net paper bags (PE inner liner) — standard industrial packaging
500 kg / 1,000 kg jumbo bags (FIBC) — bulk shipment option
1 kg / 5 kg sample quantities — available for qualification testing
Custom packaging configurations available upon request for E172-grade batches requiring dedicated food-contact compliant materials
All shipments are accompanied by a Certificate of Analysis (CoA), Safety Data Sheet (SDS), and, where applicable, a Declaration of Conformity for Black Iron Oxide E172 or cosmetic-grade Black Oxide Pigment applications.
Deep Black Color · Industrial Durability · Global Compliance
Deqing Demi Pigment Technology Co. , Ltd.

Упаковка продукта

Мы используем высококачественные упаковочные материалы и профессиональное оборудование для упаковки, паллетирования и обертывания пленкой.

  • Бумажный мешок 25 кг с пластиковым вкладышем
  • Водорастворимый мешок 25 кг
  • ПЭ мешок с низкой температурой плавления 25 кг
  • Биг-бэг 500-1250 кг
    Полный тон:

  • 101

  • 120

  • 180

  • 313

  • 330

  • 610

  • 960

  • 835

    Разбавление (1:10):

  • 101

  • 120

  • 180

  • 313

  • 330

  • 610

  • 960

  • 835

    Полный тон:

  • 110

  • 130

  • 190

  • 810

  • 318

  • 686

  • 2040

  • 5605

    Разбавление (1:10):

  • 110

  • 130

  • 190

  • 810

  • 318

  • 686

  • 2040

  • 5605

Deqing Demi Pigment Technology Co. , Ltd.

Demei занимается исследованиями, разработкой и производством неорганических железооксидных пигментов. Мы Китайская оптовая продажа Черный оксидный порошок Производители и Индивидуальный Черный железооксидный пигмент Поставщики, Фабрика. Наши пигменты включают железооксидный красный, желтый, черный, коричневый, зеленый, оранжевый, синий и т.д. Deqing Demi Pigment Technology Co. , Ltd. предлагаем Черный железооксидный E172, Железооксидный черный 318, Железооксидный черный 330, Железооксидный черный 722 и т.д. Мы производим высокопроизводительные и высокостабильные композитные железооксидные пигменты трех серий: стандартный, микронизированный и с низким содержанием тяжелых металлов.

Demei не только вносит вклад в производство и эксплуатацию, но и добросовестно выполняет свои социальные обязательства, защищает окружающую среду, усиливает безопасность производства и заботится о здоровье сотрудников.

Deqing Hele New Material Technology Co Ltd. является нашей торговой компанией.

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Отраслевые знания

Correlation Between Fe3O4 Content, Magnetism, and Color Intensity

Chemical Purity and Magnetic Performance

Synthetic black oxide pigment powder is primarily composed of magnetite (Fe3O4), a ferrimagnetic mineral. The concentration of Fe3O4 serves as the primary determinant for the pigment's magnetic susceptibility. In industrial applications such as magnetic inks, plastic masterbatches, and specialized electronic coatings, a high purity level is essential to ensure consistent electromagnetic interference (EMI) shielding or magnetic attraction properties. Deqing Demi Pigment Technology Co., Ltd. utilizes advanced precipitation and oxidation technologies to ensure that our black iron oxide maintains a high ferrous content. By stabilizing the Fe2+ to Fe3+ ratio, we provide pigments that exhibit strong magnetic induction while maintaining structural stability under mechanical stress.

Color Depth and Hiding Power

Technical Parameter Comparison

Technical Property Standard Black Oxide High-Purity Black Oxide (318/722)
Fe3O4 Content (%) 88% - 90% 93% - 95% or greater
Magnetic Susceptibility Moderate High / Consistent
Color Value (L*) Higher (Lighter Black) Lower (Deeper Jet Black)
Oil Absorption (g/100g) 25 - 35 15 - 25 (Micronized)
Tinting Strength (%) 95% - 100% 105% - 110%

Commitment to Quality: Deqing Demi Pigment Technology Co., Ltd.

Deqing Demi Pigment Technology Co., Ltd. focuses on the research, development, and production of inorganic iron oxide pigments. Our three series—standard, micronized, and low heavy metal content levels—are designed to meet the most demanding industrial specifications. Beyond production, Demei faithfully fulfills its social responsibilities by protecting the ecological environment and strengthening safe production. By choosing our high-stability composite black oxides, customers benefit from a product that cares for the health of employees and the environment while delivering peak technical performance.

Frequently Asked Questions (FAQ)

Q1: Why is Fe3O4 purity critical for Deqing Demi Pigment Technology Co., Ltd. customers?

High purity ensures that the black oxide pigment powder remains chemically stable and provides predictable results in color matching. Deqing Demi Pigment Technology Co., Ltd. maintains strict quality control over the Fe3O4 content to prevent unwanted shade shifts during the high-temperature processing of plastics and coatings, ensuring high-performance results for every batch.

Q2: Can Deqing Demi Pigment Technology Co., Ltd. provide low heavy metal black oxide for sensitive applications?

Yes. Deqing Demi Pigment Technology Co., Ltd. produces a specialized series with low heavy metal content levels. We prioritize protecting the ecological environment and social responsibility, making these pigments suitable for high-end applications that require compliance with strict international safety and health standards.

Q3: How does the micronized series from Deqing Demi Pigment Technology Co., Ltd. affect magnetic properties?

Our micronized series features a smaller and more uniform particle size distribution. While the chemical Fe3O4 content remains high, the increased surface area of Deqing Demi Pigment Technology Co., Ltd. micronized pigments allows for better dispersion in liquid systems. This ensures that the magnetic properties and color depth are distributed evenly throughout the matrix, preventing agglomeration and enhancing the final product's performance.

Chemical Surface Treatments for Optimized Dispersion of Black Oxide Pigment Powder

Surface Modification and Dispersion Mechanics

Improving the dispersion efficiency of black oxide pigment powder (magnetite, Fe3O4) in solvent-based systems requires addressing the high surface energy and polar nature of the pigment particles. Without treatment, these particles tend to flocculate in non-polar solvents, leading to poor color development and sedimentation. Deqing Demi Pigment Technology Co., Ltd. utilizes advanced surface modification techniques, such as the application of organosilanes and fatty acid derivatives, to create a lipophilic layer on the pigment surface. This chemical treatment reduces the oil absorption rate and enhances the compatibility between the inorganic pigment and organic binders. By utilizing our micronized series, manufacturers can achieve a finer grind gauge and superior gloss retention in high-end industrial coatings.

Key Chemical Treatment Strategies

Performance Comparison: Treated vs. Untreated Black Oxide

Technical Parameter Untreated Black Oxide Powder Surface-Treated (Micronized) Black Oxide
Oil Absorption (g/100g) 25 - 35 15 - 22
Hegman Gauge (Grind Fineness) 45μm - 55μm 15μm - 25μm
Viscosity in Solvent System High (Prone to thickening) Low and Stable
Color Strength Standard 10% - 15% Increase
Gloss Retention (60°) Moderate High

Commitment to Quality at Deqing Demi Pigment Technology Co., Ltd.

Deqing Demi Pigment Technology Co., Ltd. focuses on the comprehensive research, development, and production of high-stability inorganic pigments. Our production lines are capable of delivering three distinct series: standard, micronized, and low heavy metal content levels, catering to the specific needs of the coatings, plastics, and construction industries. While pushing for technical innovation in black oxide pigment powder, Demei remains dedicated to its social responsibilities, ensuring that all chemical treatments are applied within a framework that protects the ecological environment and cares for the health of employees.

Frequently Asked Questions (FAQ)

Q1: How does the micronized series from Deqing Demi Pigment Technology Co., Ltd. benefit solvent-based paint manufacturers?

The micronized series produced by Deqing Demi Pigment Technology Co., Ltd. features a significantly smaller and more uniform particle size distribution. This results in faster wetting and easier dispersion in solvent-based systems, which directly reduces the processing time and energy costs for manufacturers. Our high-performance composite pigments ensure that the black oxide maintains exceptional stability and color depth in various resin binders.

Q2: Can Deqing Demi Pigment Technology Co., Ltd. provide black oxide with low heavy metal content for international compliance?

Yes. Deqing Demi Pigment Technology Co., Ltd. has developed a specialized series of iron oxide pigments with low heavy metal content levels to meet strict global safety standards. Our commitment to fulfilling social responsibilities and protecting the ecological environment drives us to provide safe, high-quality pigment solutions that are suitable for sensitive applications without compromising on color performance.

Q3: What makes Deqing Demi Pigment Technology Co., Ltd. a reliable partner for inorganic pigments?

With 7+ years of expertise and a focus on R&D, Deqing Demi Pigment Technology Co., Ltd. covers a full spectrum of colors, including red, yellow, black, brown, and green. Our ability to integrate design, development, and production ensures that we provide consistent, high-stability pigments. We welcome furniture and coating business partners to contact us for relationships built on safe production and mutual success.