Safety Data Sheet
1. PRODUCT AND COMPANY IDENTIFIERS
Tetraammonium uranyl tricarbonate, of uranium depleted in uranium 235
- Uranate(4-), tris[carbonato(2-)-O,O’]dioxo-, tetraammonium,
- Azanium uranium carbonate
Uses: Substance is used in uranium yellow glazes.
3495 N. Dixie Hwy. Unit 8
Boca Raton, FL 33431 USA
Telephone: +1 561-826-0061
Fax: +1 561-892-8450
Emergency Phone #: (561) 826-0061
2. REGISTRY NUMBERS AND INVENTORIES
NIH PubChem CID: 3015006
EC (EINECS/ELINCS): 241-988-5
UN (DOT): 2909
Formula Mass: 522.21
Ammonium uranyl carbonate (UO2CO3·2(NH4)2CO3) is known in the uranium processing industry as AUC and is also called uranyl ammonium carbonate. This compound is important as a component in the conversion process of uranium hexafluoride (UF6) to uranium dioxide (UO2). The ammonium uranyl carbonate is combined with steam and hydrogen at 500-600°C to yield UO2.
In another process aqueous uranyl nitrate, known as uranyl nitrate liquor (UNL) is treated with ammonium bicarbonate to form ammonium uranyl carbonate as a solid precipitate. This is separated from the solution, dried with methanol and then calcinated with hydrogen directly to UO2 to obtain a sinterable grade powder. The ex-AUC uranium dioxide powder is free flowing, relatively coarse (10 µ) and porous with specific surface area in the range of 5m2/g, and suitable for direct palletization, avoiding the granulation step. Conversion to UO2 is often performed as the first stage of nuclear fuel fabrication.
The AUC process is followed in South Korea and Argentina. In the AUC route, calcination, reduction, and stabilization are simultaneously carried out in a vertical fluidized bed reactor. In most countries, sinterable grade UO2 powder for nuclear fuel is obtained by the ammonium diuranate (ADU) process, which requires several more steps.
Ammonium uranyl carbonate is also one of the many forms called yellowcake in this case it is the product obtained by the heap leach process.
3. HAZARDS AND PROTECTION
- Keep in a cool, dry, dark location in a tightly sealed container or cylinder.
- Keep away from incompatible materials, ignition sources, and untrained individuals.
- Secure and label area.
- Protect containers and cylinders from physical damage.
- All chemicals should be considered hazardous.
- Avoid direct physical contact.
- Use appropriate, approved safety equipment.
- Untrained individuals should not handle this chemical or its container.
- Handling should occur in a chemical fume hood.
Protection: Wear appropriate protective gloves, clothing, and goggles.
Respirators: Wear positive pressure self-contained breathing apparatus (SCBA).
Small Spills and leaks:
- Do not touch damaged packages or spilled material.
- Cover liquid spill with sand, earth, or other noncombustible absorbent material.
- Cover powder spill with plastic sheet or tarp to minimize spreading.
- Contact radiation safety officer.
Stability: No data.
Presence of radioactive material will not influence the fire control processes and should not influence selection of techniques.
Small Fires: Dry chemical, carbon dioxide, water spray or regular foam.
Large Fires: Water spray, fog (flooding amounts).
Ingestion, skin, and eyes: See inhalation.
- Minimal risk if packaging remains intact.
- Package damage can result in a measurable release of radiation, but the risk is still low.
Skin and eyes:
- Immediately flush with running water for at least 20 minutes.
- See ingestion.
- Apply artificial respiration if victim is not breathing.
- Administer oxygen if breathing is difficult.
- See Ingestion.
- Medical problems take priority over radiological concerns.
- Use first aid treatment according to the nature of the injury.
- Do not delay care and transport of a seriously injured person.
UN Number: 2909
Response Guide: 161
Hazard Class: 7
USCG CHRIS Code: RAD
Ammonium Uranyl Carbonate
IUPAC Name: uranium(VI)dioxide di-ammonium carbonate.
Other Names: uranyl ammonium carbonate.
Molar Mass: 522.199 g/mol
Melting Point: Decomposes between 165°C and 185°C
Solubility in water: Insoluble.
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references.
7. FURTHER INFORMATION
The above information is believed to be correct but does not purport to be all inclusive and shall be used only as a guide. The information in this document is based on the present state of our knowledge and is applicable to the product regarding appropriate safety precautions. It does not represent any guarantee of the properties of the product. IBI Labs and its Affiliates shall not be held liable for any damage resulting from handling or from contact with the above product.
Product Safety – Americas Region
Revision Date: 06/29/2021