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Magnetic nanoparticles are nano- and submicron magnetic materials that respond to an applied magnetic field.

Mknano offers ferrite nanopowders and iron oxide nanocrystals in different formats such as dry, aqueous, non-polar, and surface functionalised. A grade can be selected based on particle-size definition, composition, dispersion medium, coating, and grade-specific magnetic data. Suitability can be confirmed using the current product documentation & controlled testing.

Quick Selection Summary	Current Category Guidance
Available product families	Ferrite nanopowders, iron oxide nanocrystals, coated micro and nanobead formats
Available formats	Dry powder, non-polar dispersion, aqueous dispersion, surface-functionalised particles
Size distinction	Nanocrystals are available in nano-size ranges; coated beads extend to submicron or micron sizes
Key selection factors	Composition, particle-size definition, coating, dispersion medium, concentration, magnetic data
Buyer support	Request the current SDS, available TDS or product specification, COA, pricing, and grade-selection assistance

Browse Magnetic Nanoparticles

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MKNano
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sku: MKN-IOS-xxx

5nm, 10nm, 20nm, 30nm

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MKNano
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sku: MKN-ZnFe2O4-050

ZnFe2O4, 50 nm

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MKNano
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sku: MKN-Ni0.5Zn0.5Fe2O4-050

NiZnFe2O4, 50 nm

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MKNano
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sku: MKN-NiFe2O4-050

NiFe2O4, 50 nm

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MKNano
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sku: MKN-MnFe2O4-050

MnFe2O4, 50 nm

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MKNano
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sku: MKN-Co0.5Zn0.5Fe2O4-050

CoZnFe2O4, 50 nm

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MKNano
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sku: MKN-Co0.5Ni0.5Fe2O4-050

CoNiFe2O4, 50 nm

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MKNano
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sku: MKN-CoFe2O4-050

CoFe2O4, 50 nm

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MKNano
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sku: MKN-Fe3O4-M05

Fe3O4 Nanocrystals: 05 nm

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MKNano
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sku: MKN-IOW-OA-xxx

coated with Oleic Acid: 5nm, 10nm, 20nm

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MKNano
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sku: MKN-Fe3O4-M10

Fe3O4 Nanocrystals: 10 nm

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MKNano
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sku: MKN-IOW-COOH-xxx

coated with Carboxylic Acid (COOH): 5nm, 10nm, 15nm, 20nm, 25nm, 30nm, 40nm, 50nm

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MKNano
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sku: MKN-Fe3O4-M20

Fe3O4 Nanocrystals: 20 nm

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MKNano
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sku: MKN-IOW-COOH-PEG-xxx

coated with Carboxylic Acid (COOH) & PEG: 10nm, 15nm, 20nm, 25nm, 30nm

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MKNano
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sku: MKN-Fe3O4-M30

Fe3O4 Nanocrystals: 30 nm

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Why Source Magnetic Nanoparticles from MKnano?

Mknano’s current products allow laboratories, engineering teams, and industrial buyers to compare the magnetic nanoparticles by composition, particle size, coating, and supply format. Buyers do not have to rely on a generic material name. Before purchasing and testing, the product’s specifications and documentation should be confirmed.

Material families
Current products include cobalt, nickel, manganese, zinc and mixed ferrite nanopowders, along with magnetite and maghemite iron oxide nanocrystals.
Powder and dispersion options
Based on the intended processing route, compare dry powders, non-polar dispersions and water-based coated formats.
Surface chemistry options
Current options include carboxylic acid (COOH), polyethylene glycol (PEG), polyethylenimine (PEI), polydiallyldimethylammonium chloride (PDDA), dextran, silica and other biomolecule-linked formats.
Specification-based procurement
For the exact grade, compare purity, particle size, coating, solvent, concentration, saturation magnetisation, coercivity and remanence
Documentation support
Get the current SDS available, product specification or TDS, COA, and the available characterisation data for technical review.
Supply confirmation
Contact Mknano to know the current inventory, size, lead time, price, shipping documentation, and destination-specific requirements.

Types of Magnetic Nanoparticles Available

The classification below reflects material families and formats currently listed by MKnano. Application descriptions identify general research or engineering evaluation areas; they are not guaranteed or approved uses for every grade.

Magnetic Nanoparticle Type	Available Format, Size and Surface Treatment	Description for general research and engineering evaluation
Iron oxide nanocrystal dry powder	Selected grades are available in 5 - 30 nm sizes	Fundamental magnetism, magnetic-fluid catalysis, sensing, separation and formulation research
Iron-oxide nanocrystals in non-polar solvent	Selected sizes are available in non-polar media like toluene, hexanes and chloroform	Organic-phase processing, polymer or coating formulation and ligand-exchange research
Surface-functionalised iron oxide in water	COOH, PEG, PEI, PDDA, dextran, silica, and selected biological-ligand formats	Aqueous processing, conjugation, magnetic separation, biosensing and biomedical research. Research use does not establish suitability for regulated use.
Single-composition spinel ferrite nanopowders	Current options are COFE2O4, NiFe2O4, MnFE2O4, ZnFe2O3 dry nanopowders	Magnetic ceramics, sensors, catalysis, inductive materials, ferro-fluid and composition-property studies.
Mixed ferrite nanopowders	Current options include Ni-Zn, Co-Zn and Co-Ni ferrite compositions,	Evaluation of component-dependent magnetisation, coercivity, resistivity or frequency behaviour. Results depend on grade and processing.
Coated micro and nanobead formats	Dextran and silica-coated formats are available in nano, submicron and micron sizes.	Separation, capture, purification and surface-functionalisation workflows. Confirm the stated size definition and the exact grade.

Magnetic Nanoparticle Selection Guide

Buyer Need	Magnetic Nanoparticle- General Starting Point
Water-dispersible particles for conjugation or assay-development research	Consider COOH, PEG, PEI, dextran or silica-coated iron-oxide particles. Check the coating chemistry, charge, concentration, and compatibility with the intended workflow.
Particles for organic-solvent or polymer processing	Consider an available non-polar iron-oxide dispersion. Check the exact solvent, ligand, concentration, matrix compatibility and storage instructions.
Dry magnetic nanopowder	Compare the magnetic nanocrystal powders and the ferrite nanopowders using the current specifications, particle size, COA and available magnetic data.
Higher-coercivity composition studies	Compare manufacturers' data currently available for cobalt and other ferrous grades under equivalent measurement conditions. Do not generalise across various grades.
Lower-coercivity or soft-magnetic studies	Compare grade-specific saturation magnetisation, coercivity and remanence under stated measurement conditions.
Recoverable adsorbent or catalyst-support research	Compare chemically compatible iron oxide or ferrite grades. Validate recovery, reaction, compatibility and reuse under controlled conditions.

Magnetics Nanoparticle- Technical Selection Guide

Magnetic Nanoparticle Specification	Why It Matters	Buyer / Engineering Check
Chemical composition	Can influence magnetic behaviour, oxidation response, electrical properties and chemical compatibility.	Check the exact composition and use the current grade-specific documentation. Do not assume all ferrites behave alike.
Particle-size definition	Core size, aggregate size and hydrodynamic size are not interchangeable.	Check the measurement method and whether the reported number refers to TEM core size, aggregate size, hydrodynamic size or another definition.
Particle-size distribution	Can affect the reproducibility, colloidal behaviour and measured magnetic response.	Check available characterisation data and review the distribution. Do not rely on one average value.
Surface coating and functional group	Can affect the colloidal stability, solvent compatibility, charge and conjugation chemistry.	Compare the listed coating with the intended medium and downstream chemistry. Check compatibility through controlled testing.
Dispersion medium and concentration	Can affect immediate process compatibility, colloidal behaviour and storage.	Check the exact solvent or aqueous medium, concentration, storage conditions and product instructions,
Saturation magnetisation, Ms	Refers to the magnetisation measured or reported under specific conditions,	Check the value only for the exact grade and equivalent methods, units and conditions. Particle size, coating fraction and method can affect the result.
Coercivity and remanence	Refers to the hysteresis behaviour and residual magnetisation after field removal.	Use grade-specific data. Low remanence does not guarantee easy redispersion, as coating medium and concentration also matter.
Purity and residual chemistry	Residual salts, surfactants or precursors can affect the downstream processing and reproducibility.	Check the current specification and COA for the exact grade. Do not infer purity from a related product.
Documentation	Supports safety review, method validation and procurement approval.	Check the current SDS, available product specification or TDS, COA, storage instructions and relevant characterisation data.

What Does Superparamagnetic Mean?

It is a measurement-dependent magnetic state and not a universal particle-size label. In the state of supermagnetism, the small single-domain particles respond strongly to an applied magnetic field. Their magnetic moments fluctuate over the measurement timescale when the magnetic field is removed.

A particle is considered to be supermagnetic based on the composition, particle volume, magnetic anisotropy, temperature, interparticle interactions, and measurement time. Size alone is not enough to classify every listed product as supermagnetic. The exact grade, particle size definition, saturation magnetisation, coercivity, remanence and test conditions need to be reviewed.

Research and Engineering Applications

The research and engineering evaluation areas are listed below. However, they are not approved to be used for every grade. The exact product needs to be tested under the planned conditions along with the safety, regulatory and technical review.

Magnetic Nanoparticle Application	Possible Material Focus	What to Confirm
Magnetic separation	Coated, water-based iron-oxide particles	Particle-size definition, surface group, charge, concentration, magnetic response and target compatibility.
Catalyst or catalyst support	Chemically suitable iron oxide or ferrite grade	Composition, reaction compatibility, recovery method, reuse conditions and contamination risk.
Sensors and magnetic devices	Ferrite or iron-oxide particles	Size, composition, coercivity, remanence, saturation magnetisation, and processing route.
Ferrofluids, coatings and polymers	A dispersion compatible with the host medium.	Solvent, coating, concentration, storage stability and matrix compatibility.
Water-treatment research	Iron-oxide or surface-treated magnetic particles	Target species, pH, competing ions, recovery, reuse, and disposal requirements.
Biomedical research	Research-use coated iron-oxide particles.	Product status, coating, stability, sterility requirements, biocompatibility evidence and regulatory approval needs. Do not assume medical approval.

Documentation and specification support

While requesting a recommendation or quotation, provide information such as intended application, composition, target size definition, coating or functional group, dispersion medium, purity, concentration, required magnetic data, quantity and destination. Check the current SDS, available product specification or TDS, COA and available characterisation data. Prioritise the product documentation over general page content.

Handling, Safety and Documents

Safety requirements vary based on the material, coating, particle size and supply format. Before handling, review the current SDS and the product label. Follow the instructions in the controls, storage, spill, disposal and transportation documents. Do not use this page as a substitute for workplace risk assessment, training or application-specific safety advice.

Documents to request: current SDS, available TDS or product specification, COA, storage instructions and available grade-specific characterization data.

Frequently Asked Questions

Q. What is meant by a magnetic nanoparticle?

A. A magnetic nanoparticle is a particle under 100 nanometers that responds to an applied magnetic field. Mknano offers magnetic nanoparticles like iron oxide nanocrystals, ferrite nanopowders, and coated bead formats.

Q. What is supermagnetism?

A. It is a state where the nanoparticles respond to an external magnetic field and do not stay magnetised when the magnetic field is removed.

Q. What is the difference between iron oxide and ferrite nanoparticles?

A. Iron oxide nanoparticles include magnetite (Fe2O4) or maghemite (y-Fe2O3). Spinel ferrites combine iron oxide chemistry with other metal components like nickel, cobalt, manganese, and zinc. Their magnetic and processing behaviour vary based on the composition and grade.

Q. Why do magnetic nanoparticles need a coating?

A. A coating prevents the particles from clumping together and allows them to mix easily. Select a coating based on the dispersion medium and downstream chemistry. Mknano offers options, such as COOH, PEG, PEI, PDDA, dextran, silica, and others. Check the compatibility through controlled testing.

Q. Which is better - powder or dispersion?

A. Powder is best suited for dry blending, ceramic processing, and custom formulations. A dispersion reduces the need for initial wetting or dispersion development.

Q. Will I get core documentation for a preferred product?

A. Yes. Request the current SDS, available product specification of TDS, COA, and available size, surface, or magnetic characterization for the selected product.

Q. Can the products be used in medical applications?

A. Medical use requires product-specific documentation, independent testing, and applicable regulatory, technical, and legal approvals. Do not assume medical approval. Biomedical references describe the research areas only.

Q. Does Mknano take bulk-quantity enquiries?

A. Provide information like the exact grade, particle size, coating, quantity, test purpose, and destination, and Mknano will confirm the current availability, pack sizes, price, and quotation options.

Technical Notice: This content provides general technical information, not application-specific engineering or safety advice. Results depend on product grade, materials, methods, and operating conditions. Review the current SDS, TDS and product instructions, and independently test and confirm suitability before use. [Read the full Technical Information Disclaimer.]

Shop by Brand

Magnetic Nanoparticles

MKNano

sku: MKN-IOS-xxx

MKNano

sku: MKN-ZnFe2O4-050

MKNano

sku: MKN-Ni0.5Zn0.5Fe2O4-050

MKNano

sku: MKN-NiFe2O4-050

MKNano

sku: MKN-MnFe2O4-050

MKNano

sku: MKN-Co0.5Zn0.5Fe2O4-050

MKNano

sku: MKN-Co0.5Ni0.5Fe2O4-050

MKNano

sku: MKN-CoFe2O4-050

MKNano

sku: MKN-Fe3O4-M05

MKNano

sku: MKN-IOW-OA-xxx

MKNano

sku: MKN-Fe3O4-M10

MKNano

sku: MKN-IOW-COOH-xxx

MKNano

sku: MKN-Fe3O4-M20

MKNano

sku: MKN-IOW-COOH-PEG-xxx

MKNano

sku: MKN-Fe3O4-M30

Why Source Magnetic Nanoparticles from MKnano?

Types of Magnetic Nanoparticles Available

Magnetic Nanoparticle Selection Guide

Magnetics Nanoparticle- Technical Selection Guide

What Does Superparamagnetic Mean?

Research and Engineering Applications

Documentation and specification support

Handling, Safety and Documents

Frequently Asked Questions

Q. What is meant by a magnetic nanoparticle?

Q. What is supermagnetism?

Q. What is the difference between iron oxide and ferrite nanoparticles?

Q. Why do magnetic nanoparticles need a coating?

Q. Which is better - powder or dispersion?

Q. Will I get core documentation for a preferred product?

Q. Can the products be used in medical applications?

Q. Does Mknano take bulk-quantity enquiries?