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.

this product will stain things, so be careful - but for what it is the purity and particle size is exactly as described, about one year later, and half a bag used - and the product is still stable and viable! would recommend!