

Gadolinium Oxide (Gd2O3, CAS 12064-62-9), 99.9–99.999%, supplied wholesale by Zyntex. Rare earth oxide for nuclear burnable absorbers, X-ray phosphors, GGG crystals, optical glass and gadolinium compounds. CoA and SDS.
Gadolinium(III) oxide (Gd2O3) is a white, fine powder that is insoluble in water and dissolves in acids. Gadolinium has the highest neutron capture cross-section of all stable elements and strong paramagnetism, which explains most of its uses.
In addition, nuclear fuel producers add gadolinium oxide to uranium fuel as a burnable neutron absorber. Similarly, phosphor producers use it to make gadolinium oxysulfide, the host for X-ray intensifying screens and detectors, while crystal growers use it for gadolinium gallium garnet (GGG) substrates and laser crystals. It is also the starting material for gadolinium compounds used in MRI contrast agents and in magnetocaloric research.
In addition, glass producers use it in high-refractive optical glasses. For the metal form, see Gadolinium Powder; related rare earth oxides in our range also include Europium Oxide, Yttrium (III) oxide and Dysprosium Oxide.
Typical uses include, for example:
⚛️ Nuclear Fuel
Burnable neutron absorber.
🩻 X-Ray Phosphors
Raw material for intensifying screens as well as detectors.
💎 Garnet Crystals
Raw material for GGG substrates as well as lasers.
🧪 Gadolinium Compounds
Starting material for contrast agent precursors.
| Parameter | Standard Value |
|---|---|
| Product Name | Gadolinium Oxide |
| CAS Number | 12064-62-9 |
| Molecular Formula / Weight | Gd2O3 / 362.50 g/mol |
| Purity Grade (REO) | 99.9% to 99.999% |
| Physical Presentation | White Fine Powder |
| Documents | CoA as well as SDS with every lot |
⚠️ Safety & Handling: May cause eye and respiratory irritation. Avoid dust formation and also wear dust protection and eye protection. Store in tightly closed containers in a dry place. Always consult the Safety Data Sheet (SDS), because it contains the full classification and handling instructions.
Why is gadolinium oxide used in nuclear fuel?
Because gadolinium absorbs neutrons extremely strongly, it controls reactivity at the start of a fuel cycle and then burns away gradually.
Which purities do you supply?
Purities from 99.9% up to 99.999% on a rare earth oxide basis, while the highest grades suit phosphors and crystals.
How can I get a price and documents?
Prices depend on quantity, packaging and destination, so please contact us with your required volume. We then send a quotation together with the CoA and SDS.