---
product_id: 3686340
title: "Black Iron Oxide - Fe3O4 - Synthetic - 1 Pound"
brand: "alpha chemicals"
price: "₩45343"
currency: KRW
in_stock: true
reviews_count: 13
category: "Alpha Chemicals"
url: https://www.desertcart.kr/products/3686340-black-iron-oxide-fe3o4-synthetic-1-pound
store_origin: KR
region: South Korea
---

# Resealable, freshness-sealed bag Fe3O4 magnetic power 0.30 micron ultra-fine particles Black Iron Oxide - Fe3O4 - Synthetic - 1 Pound

**Brand:** alpha chemicals
**Price:** ₩45343
**Availability:** ✅ In Stock

## Summary

> 🧲 Unlock magnetic magic with precision-engineered Fe3O4 powder!

## Quick Answers

- **What is this?** Black Iron Oxide - Fe3O4 - Synthetic - 1 Pound by alpha chemicals
- **How much does it cost?** ₩45343 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/3686340-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

- • **Secure Storage:** Comes in a resealable, double-sealed bag with tear-off tab for ultimate freshness and safety.
- • **Magnetic Mastery:** Harness the power of synthetic Fe3O4 for next-level magnetic putty and slime experiments.
- • **Versatile Applications:** Perfect for welding, pigments, ceramics, and innovative DIY science projects.
- • **Precision Particle Size:** Ultra-fine 0.30 micron powder ensures smooth mixing and consistent results every time.
- • **Trusted Quality & Delivery:** Reliable, high-quality synthetic iron oxide with fast shipping and rave reviews.

## Overview

This 1-pound pack of synthetic Black Iron Oxide (Fe3O4) features ultra-fine 0.30 micron particles ideal for magnetic putty, pigments, ceramics, and welding. Delivered in a resealable, double-sealed bag for freshness and safety, it’s a trusted choice for professionals and hobbyists seeking consistent, high-quality magnetic powder.

## 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: Excellent value for money! - 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: High quality, reliable seller. - 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.

## 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B008LEOMJC |
| Best Sellers Rank | #103,407 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #92 in Inorganic Reagents |
| Date First Available | July 14, 2012 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.1 pounds |
| Item model number | C2I_INV_B008LEOMJC_R |
| Manufacturer | DYUEOK |
| Product Dimensions | 9 x 3.5 x 6 inches |
| UPC | 725410978229 |

## Product Details

- **Brand:** Alpha Chemicals
- **Item Form:** Powder
- **Item Volume:** 1 Liters
- **Item Weight:** 1.1 Pounds
- **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

### ⭐⭐⭐⭐⭐ Excellent value for money!
*by G***E on October 14, 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.

### ⭐⭐⭐⭐⭐ High quality, reliable seller.
*by N***B on March 22, 2019*

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 does the job
*by A***C on October 18, 2023*

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

## Frequently Bought Together

- Black Iron Oxide - Fe3O4 - Synthetic - 1 Pound
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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-02-09*