---
product_id: 266511096
title: "Black Iron Oxide - Fe3O4 - Synthetic - 1 Pound"
brand: "alpha chemicals"
price: "$U3409"
currency: UYU
in_stock: true
reviews_count: 5
category: "Alpha Chemicals"
url: https://www.desertcart.uy/products/266511096-black-iron-oxide-fe3o4-synthetic-1-pound
store_origin: UY
region: Uruguay
---

# Resealable, safety-sealed packaging Synthetic Fe3O4 magnetite 0.30 micron particle size Black Iron Oxide - Fe3O4 - Synthetic - 1 Pound

**Brand:** alpha chemicals
**Price:** $U3409
**Availability:** ✅ In Stock

## Summary

> 🧲 Unlock the power of magnetism with precision-engineered Black Iron Oxide!

## Quick Answers

- **What is this?** Black Iron Oxide - Fe3O4 - Synthetic - 1 Pound by alpha chemicals
- **How much does it cost?** $U3409 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/266511096-black-iron-oxide-fe3o4-synthetic-1-pound)

## Best For

- alpha chemicals enthusiasts

## Why This Product

- Trusted alpha chemicals brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Precision Particle Size:** Ultra-fine 0.30 micron powder for consistent performance
- • **Science-Ready & Reliable:** Perfect for professional projects, magnetic putty, and innovative experiments
- • **Secure & Fresh Packaging:** Double-sealed, resealable bags ensure safety and long-term freshness
- • **Versatile Industrial Use:** Ideal for welding, pigments, ceramics, and magnetic experiments
- • **Premium Synthetic Magnetite:** High-purity Fe3O4 sourced from trusted Rockwood production

## Overview

Alpha Chemicals Black Iron Oxide (Fe3O4) is a synthetic, ultra-fine 0.30 micron magnetite powder designed for industrial and scientific applications including welding, pigments, ceramics, and magnetic experiments. Delivered in double-sealed, resealable packaging to ensure safety and freshness, it’s the go-to choice for professionals and innovators seeking reliable, high-purity iron oxide.

## 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.

Review: 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.
Review: My daughter needed this for her school science project. The price was good. But be aware this stuff makes a mess. Not easy to get off skin or clothes. But other than that. It worked great. Was mailed fast.

## Features

- 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
- Particle size runs about 0. 30 micron
- Used in thermite welding, fertilizers, pigments, ceramics, along with a lot of other uses

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B008LEOMJC |
| Item model number | C2I_INV_B008LEOMJC_R |
| Manufacturer | Alpha Chemicals |
| Product Dimensions | 22.86 x 8.89 x 15.24 cm; 498.95 g |
| UPC | 725410978229 |

## Product Details

- **Brand:** Alpha Chemicals
- **Item form:** Powder
- **Item volume:** 1 Liters
- **Item weight:** 499 g
- **Package information:** Bag

## Images

![Black Iron Oxide - Fe3O4 - Synthetic - 1 Pound - Image 1](https://m.media-amazon.com/images/I/613R-8tA-HL.jpg)

## Questions & Answers

**Q: Would this be a good choice for use with demonstrations of magnets and magnetic fields?**
A: 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.

**Q: Would this be a good choice for making ferrofluid?**
A: 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.

**Q: 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.**
A: 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 !

**Q: Is this suitable for making cosmetics?  Cosmetic grade , if you will?**
A: 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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by G***E on 14 October 2023*

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.

### ⭐⭐⭐⭐⭐ Review
*by A***Y on 11 September 2019*

My daughter needed this for her school science project. The price was good. But be aware this stuff makes a mess. Not easy to get off skin or clothes. But other than that. It worked great. Was mailed fast.

### ⭐⭐⭐⭐⭐ Review
*by M***R on 12 May 2024*

I wanted to make some magnetic play doh. I found an easy playdoh recipe on google using 2 cups of all purpose flour, 3/4 cup of salt 4 teaspoons of cream of tartar and 2 cups of lukewarm water. I added a cup of the iron oxide and cooked it in a pot stirring until it became playdoh. Then I took some strong magnets to make the playdoh move around. Kids loved it. The iron oxide is black so the playdoh came out black and makes your hands dirty which is a downside. On the bright side my kid keeps leaving food in his room so I sprinkled some black playdoh near the walls and told him it’s mouse droppings. He stopped eating in his room, but also stopped sleeping there.

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*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-02-19*