Would this be a good choice for use with demonstrations of magnets and magnetic fields?

That depends on what you're trying to do. You won't be able to make a true ferrofluid (that is, a silky smooth, low viscosity, inky black fluid), but you can indeed make a more 'chunky' magnetic fluid. You'll need strong magnets.

Would this be a good choice for making ferrofluid?

In short, no! I was mislead by the first answer to this question and bought a bag to play with. The problem is particle size; ferrofluids require particles under about 10 nanometers and these are (claimed to be) 1 micron (1000 nanometers) in size. Far too large for ferrofluids, but I think I'll find something interesting to do with the stuff.

If made into putty or ink, is there a way to get this stuff to attract 'itself'? Ex: Spread the magnetized ink on 2 sheets of paper.

It seems to just lay there and do nothing on it's own. I made the putty (be sure to ware gloves when making it - it is OK to handle later) You have to have a really strong magnet to attract it - - it is a fun science lab for kids but the Fe3O4 is not magnetic it is attracted by a magnet. It can be really messy !

Is this suitable for making cosmetics? Cosmetic grade , if you will?

Yes. I actually saw a video where the woman had used for cosmetics. She did much research and found that it was suitable and safe for cosmetic purposes.

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Black Iron Oxide - Fe3O4 - Synthetic - 1 Pound

Black Iron Oxide - Fe3O4 - Synthetic - 1 Pound

Product ID: 133852726

Details

Brand
Alpha
Item Volume
1 Litres
Item Weight
1.1 Pounds
Manufacturer
Alpha
UPC
725410978229

🔥Ideal for high-temp thermite welding

🧲Synthetic Fe3O4 with strong magnetic properties

⚙️0.30 micron ultra-fine particle size

VT22618

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Description

🧲 Unlock the magnetic magic of precision-engineered black iron oxide!

MAGNETIC MARVEL - Perfect for cutting-edge magnetic putty and slime experiments that captivate and inspire.
BULK READY FOR INNOVATION - One full pound of premium black iron oxide to fuel your creative and industrial projects without interruption.
SYNTHETIC PURITY GUARANTEED - Produced by Alpha Chemicals for reliable, contaminant-free performance every time.
VERSATILE INDUSTRIAL POWERHOUSE - From thermite welding to fertilizers and ceramics, unlock endless professional-grade uses.
PRECISION ENGINEERED MICROPARTICLES - Experience unmatched consistency with ultra-fine 0.30 micron particles for flawless application.

This 1-pound synthetic Black Iron Oxide (Fe3O4) from Alpha Chemicals features ultra-fine 0.30 micron particles, making it ideal for thermite welding, fertilizers, pigments, ceramics, and innovative magnetic experiments. Engineered for purity and versatility, it’s the go-to material for professionals and creators seeking reliable, high-performance iron oxide.

Specifications

ASIN	B008LEOMJC
Best Sellers Rank	#55,068 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1,156 in Lab Chemicals
Brand Name	Alpha Chemicals
Country Of Origin	USA
Customer Reviews	4.4 4.4 out of 5 stars (1,057)
Item Weight	1.1 Pounds
Manufacturer	Alpha
Manufacturer Part Number	1SynFe
Model Number	C2I_INV_B008LEOMJC_R
UPC	725410978229
Volume	1 Litres

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VT22618

Duties & taxes included

In stock

Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Vanuatu.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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