Black Iron Oxide - Fe3O4 - Synthetic - 1 Pound

Got this for a school science project, and it came exactly as in the product description and photo. We’d ordered two packages, and they came double sealed. What’s more, the individual packages have a resealable zip, so that makes storage within uses that much more convenient, safe and reliable. The particle size is not quite nanometer size, but then that too was mentioned clearly in the product description, and we knew that beforehand. So, no complaints there. Oh, and it was delivered earlier than promised! A pleasant surprise.

Comes in a re-sealable bag as everything from this company does. I like ordering from these guys, they always deliver on time and their stuff always works. Used this to make some magnetic putty and it turned out great, swallowed those magnets like alien goo. Keep in mind if you will be using this for the same thing the putty doesn't keep. The humidity build up in the jar causes the metal powder to rust.

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

Really was surprised at its consistency. Very fine particles but seem to "clump" and not flow out of its container. This maybe a characteristic of synthetic makeup. Purpose of purchase was to tint white powder to a grey shade but haven't tried that yet. It is probably a quality product that I am not familiar with yet. Time will tell.

If you making magnetic this/that/the other, should work. If your making conductive paint, try graphite powder.

I used this to make magnetic slime for my science class and it worked really well! 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.

Bought to make a Ferro-fluid jar and magnetic slime. Such fun projects! Just beware that if you're making ferro-fluid you will want to mix it in a container you don't need because you are essentially making printer ink and that stuff will stain like crazy.

Enough Fe3O4 to make hundreds of projects...<a href="http://m.instructables.com/id/ferromagnetic-fluid/"> ferro fluid</a>, <a href="http://m.instructables.com/id/magnetic-silly-putty/">magnetic silly putty </a> ( Toysmith Original Silly Putty Pack #104-48 12 PACK ), or even a <a href="http://www.ferrolic.com/where-digital-meets-nature/">clock </a>! Take care when using as this is used to dye items black and is such a fine grained powder that it will make its way into the pores of just about anything -- including your skin! Disposable Latex Gloves, Powder Free Size Large, 100 gloves per box