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Black Iron Oxide - Fe3O4 - Synthetic - 1 Pound

4.5 4.5 out of 5 stars 1,069 ratings

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Brand Alpha Chemicals
Item Weight 1.1 Pounds
Item Volume 1 Liters
Package Information Bag
Item Form Powder

About this item

  • Fe3O4, also known as magnetite or Iron (II,III) Oxide
  • This comes from a synthetic source and is produced by Rockwood
  • Particle size runs about 0.30 micron
  • Used in welding, pigments, ceramics, experiments, along with a lot of other uses
  • Used in magnetic putty, magnetic slime, and other experiments

Additional Details

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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 9 x 3.5 x 6 inches; 1.1 Pounds
  • Item model number ‏ : ‎ C2I_INV_B008LEOMJC_R
  • Date First Available ‏ : ‎ July 14, 2012
  • ASIN ‏ : ‎ B008LEOMJC
  • Customer Reviews:
    4.5 4.5 out of 5 stars 1,069 ratings

Product Description

Shipped in a resealable bag that is sealed for safety and freshness. It includes a tear-off tab for easy opening. Ideal for making magnetic putty/slime. Gloves are recommended when using it since it is a very fine pigment powder.

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Customer reviews

4.5 out of 5 stars
4.5 out of 5
1,069 global ratings

Customers say

Customers like the quality, performance, and magnetic properties of the lab chemical. For example, they mention it's great for making magnetic slime and good for different magnet related experiments. That said, some complain about the ease of cleaning.

AI-generated from the text of customer reviews

83 customers mention73 positive10 negative

Customers like the performance of the lab chemical. They say it works well for their purposes, it turns out great, and it's still viable. Customers also say it'll be worth the purchase for any scouting, schooling, or science experimenting person.

"...Used this to make some magnetic putty and it turned out great, swallowed those magnets like alien goo...." Read more

"...It worked great and a few tips I would give if you also plan on using this to make magnetic slime. A little bit goes a long way I..." Read more

"...year later, and half a bag used - and the product is still stable and viable! would recommend!" Read more

"oof. I used this to make magnetic slime. It worked wonderfully, but the powder is black black black and the slime turns nails and fingers black, too...." Read more

55 customers mention50 positive5 negative

Customers are satisfied with the quality of the lab chemical. They mention that it's cool to play with, amazing, and a great project for kids. Some say that it is perfect for a science fair project and an interesting concept. Overall, customers are happy with the product's quality.

"...so that makes storage within uses that much more convenient, safe and reliable...." Read more

"...It worked like it should. It was good quality." Read more

"It's decent quality product, that's available quickly. I don't need much of it, so it's not a big deal that it's above regular cost." Read more

"Bought to make a Ferro-fluid jar and magnetic slime. Such fun projects!..." Read more

45 customers mention36 positive9 negative

Customers like the magnetic. For example, they say it's great for making magnetic slime, good for different magnet-related experiments, and perfect for magnetic paste. That said, some complain it can stain hands and surfaces.

"...to make some magnetic putty and it turned out great, swallowed those magnets like alien goo...." Read more

"...It was super fun with the magnets to make the slime follow the magnet! Super fun hit with the kids!!" Read more

"Great for making magnetic slime. Very popular with my middle school students! Tip: for making slime, you need to use quite a lot...." Read more

"...a product that is attracted to magnets, but yet I had a problem making magnetic putty since the puddy stretches so much, and the black iron oxide..." Read more

6 customers mention6 positive0 negative

Customers find the lab chemical versatile. They mention it's great for slime and experiments, perfect for making slime, and excellent as a polishing compound for steel. Customers also say it works well and children love the slime they make with it.

"Excellent for a polishing compound for steel" Read more

"was perfect for slime will make hands and anything it touches black at first but easily wipes off. as described ,would by again." Read more

"It worked and the children loved the slime we made with it." Read more

"Great for slime and experiments..." Read more

12 customers mention4 positive8 negative

Customers are mixed about the blackness of the lab chemical. Some mention that it's very black, and great for darkening paint, while others say that it turns their hands and everything it touches black.

"...It worked wonderfully, but the powder is black black black and the slime turns nails and fingers black, too. Use sparingly and beware the staining." Read more

"...It mixed well and made a very dark slime that moves towards magnets.Warning: this powder is super fine so it is messy and gets everywhere." Read more

"...Makes a HUGE mess. Will turn your hands, and everything the slime touches black...." Read more

"...It worked well! turns your hands black and can be quite messy but it does the job." Read more

38 customers mention3 positive35 negative

Customers dislike the ease of cleaning with the lab chemical. They mention that it makes a huge mess, clumps, and gets all over. The powder is very fine and powdery, and it stains like crazy. It also smears all over the surface and leaves black residue on hands.

"Very messy but that cannot be helped, it’s just a characteristic of the product. Does its job." Read more

"...No matter how I tried to get it out, I wound up making a huge mess and after the first time I opened it, the ziploc on the bag never sealed again..." Read more

"...because you are essentially making printer ink and that stuff will stain like crazy." Read more

"...it sticks to it, and when you try to brush it off it will smear all over the surface. And this situation is even worse if water is involved...." Read more

4 customers mention0 positive4 negative

Customers find the ease of removal of the lab chemical to be difficult. They mention that it is hard to remove from hands, floors, tables, and other surfaces. Some customers also mention that the product is very powdery and almost impossible to get off of hands.

"Co for magnetic slime, but the black is hard to get off of hands, floors, tables. Must be really careful what this ends up on." Read more

"...even wearing gloves will create a huge mess around and impossible to remove from items...." Read more

"Very powdery! Was almost impossible to get off of hands! I don’t rrccomend this for slime!" Read more

"awful stuff very messy turned hands and nails black,,hard to remove" Read more

Works for magnetic slime
5 Stars
Works for magnetic slime
Worked like a charm for magnetic slime! Just make sure you wear gloves before you open it and use it outside because it is messy.
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Top reviews from other countries

Ashley
5.0 out of 5 stars Messy but good quality.
Reviewed in Canada on September 11, 2019
One person found this helpful
Report
Vision Jinx
5.0 out of 5 stars A load of ferromagnetic fun
Reviewed in Canada on November 22, 2021
Customer image
Vision Jinx
5.0 out of 5 stars A load of ferromagnetic fun
Reviewed in Canada on November 22, 2021
Black Iron Oxide or Fe3O4 can be a lot of fun to make magnetic compounds out of, from magnetic slime to ferrofluids and beyond (like Thermite), but the clean up is unreal. This is worth mentioning that these are nanoparticles in size so are basically as small as pollen and really should avoid inhaling it under any condition, it will go through a dust mask, so take care when handling it in its powder state. It also should go with a warning that this will stain basically everything it comes in contact with so be well prepared for a messy cleanup. The pictures attached are a basic ferromagnetic fluid that you can see how this powder reacts under a magnetic field when coated with a surfactant and suspended in different carrier fluids. Enjoy with care!
Images in this review
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5 people found this helpful
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Zoe Lu
5.0 out of 5 stars ... kids to make slime with - this stuff is amazing! works really well
Reviewed in Canada on January 12, 2018
2 people found this helpful
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Leah
4.0 out of 5 stars Great for our science experiments
Reviewed in Canada on December 12, 2017
5 people found this helpful
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Judes
5.0 out of 5 stars A little goes a long way
Reviewed in Canada on July 15, 2022