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Uranium Oxide Powder

CAS 12035-97-1
Linear Formula: UO
MDL Number: N/A
EC No.: 215-700-3


(2N) 99% Uranium Oxide Powder
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Compound Formula UO
Molecular Weight 254.03
Appearance solid
Melting Point N/A
Boiling Point N/A
Density 10.15 g/cm3
Monoisotopic Mass 286.035528 Da
Exact Mass 286.036 g/mol

Health & Safety Information

Signal Word N/A
Hazard Statements N/A
Hazard Codes N/A
Risk Codes N/A
Safety Statements N/A
Transport Information N/A

View and Print SDS


Date Accessed: 01/21/2017
Date Revised: 05/15/2015


Product Name: Uranium Oxide Powder

Product Number: All applicable American Elements product codes, e.g. U-OX-02-P , U-OX-03-P , U-OX-04-P , U-OX-05-P

CAS #: 12035-97-1

Relevant identified uses of the substance: Scientific research and development

Supplier details:
American Elements
1093 Broxton Ave. Suite 2000
Los Angeles, CA 90024
Tel: +1 310-208-0551
Fax: +1 310-208-0351

Emergency telephone number:
Domestic, North America +1 800-424-9300
International +1 703-527-3887


OSHA Hazards
Toxic by inhalation, toxic by ingestion.
Target Organs
Kidney, Liver, Lungs, Brain
GHS Label Elements

Health Hazard - GHS08 Exclamation Mark - GHS07

Signal Words: Danger
Hazard Statements: Toxic by inhalation and ingestion
Danger of cumulative Effects
May damage kidneys
Precautionary Statements: Avoid breathing dust
Avoid contact with skin, eyes and clothing
When using do not eat, drink or smoke
In case of accident or if you feel unwell seek medical advice
Use only with adequate ventilation
Other Hazards: Radioactive
GHS Classification
Skin Irritation (Category 2)
Eye Irritation (Category 2)
Specific target organ toxicity – repeated exposure (Category 2)
Specific target organ toxicity – acute exposure (Category 2)
GHS Hazard Ratings
R23/25: Toxic by inhalation and ingestion
R33: Danger of cumulative effects
S20/21: When using do not eat, drink or smoke
S45: In case of accident or if you feel unwell seek medical advice immediately
S61: Avoid release to the environment


Chemical Name: Uranium Oxide (UO2), 100%
CAS Number: 1344-57-6


INHALATION: Conscious victims should immediately leave the area of airborne contamination, move to a restricted area for evaluation and decontamination, and ask facility safety personnel for assistance. Before entry into areas of airborne contamination, rescuers should don respirators with high-efficiency particulate filters or self-contained air supply. If victim's breathing has stopped, perform artificial respiration; if possible use mechanical means, which prevent contamination of the rescuer.
A nasal swab should be obtained by trained (radiation) safety personnel. After obtaining the swab, the victim should be instructed to cough and blow his nose to eliminate as much material as possible, and to wash or wipe his face. Obtain medical assistance immediately. The victim and victim's clothing, personal items, and equipment should be monitored for external contamination. If delay will not impact the health of the victim, decontamination should be started before the victim is moved to the medical area. Rescue and safety personnel who enter the contaminated area or assist the victim should be monitored for contamination and decontaminated if necessary.
SKIN CONTACT: Inform facility safety personnel and follow all instructions. In general, the victim should thoroughly wash the contaminated area with soap and water, taking special care to clean body crevices such as fingernails. The victim should monitor for residual contamination or be monitored by another person, as called for by site safety documents. Skin injuries and abrasions increase the danger that uranium may penetrate the skin. It is best not to shave the victim or to use harsh brushes. If water and soap have not removed the uranium, seek expert advice. Do not apply organic solvents, which may be toxic, may be absorbed through the skin, and may increase the solubility and absorption of the uranium.
Skin contamination may indicate that material inhalation, ingestion, or contamination of clothing or equipment has occurred. Contaminated clothing, personal items, or equipment must be cleaned or discarded. The water used for decontamination procedures must be treated as if it contains radioactive materials and treated or disposed of appropriately. Rescue and safety personnel who come in contact with a contaminated area or victim should be monitored for contamination and decontaminated if necessary.
EYE CONTACT: Immediately flush the eyes with large amounts of water for at least 15 minutes, occasionally lifting the upper and lower lids. If available, follow with an isotonic solution. Obtain medical assistance immediately. If delay will not impact the victim's health, monitor the victim before transfer to the medical facility and, if necessary, decontaminate clothing, personal items, and skin. Any water or other cleaning agents used in decontamination procedures must be suspected of containing radioactive material and treated or disposed of accordingly. Rescue and safety personnel who enter the accident area or assist the victim must be monitored for contamination and decontaminated if necessary.
INGESTION: Immediately rinse the mouth, being careful that the victim does not swallow the water used for this purpose. Uranium is not easily absorbed from the digestive system, but is a more dangerous hazard when inhaled. Therefore, it may be better to remove stomach contents by pump than by vomiting. Obtain medical advice and assistance immediately. If medical advice or assistance is not immediately available, vomiting may be induced; care should be taken to avoid aspiration of vomitus. Do not induce vomiting in an unconscious person. Vomitus and lavage fluids can assist safety personnel in determining the level of exposure and should be saved for later examination. The victim should be monitored for contamination of the skin or clothing. If delay will not impact the victim's health, decontamination should be attempted before the victim is transported to a medical facility. Rescue and safety personnel who enter a contaminated area or assist a contaminated victim should be monitored for decontamination.


Suitable Extinguishing Media: Dry chemical, carbon dioxide, water spray, or regular foam. (See the most recent Emergency Response Guidebook, (ERG), developed jointly by Transport Canada (TC), the U. S. Department of Transportation (DOT) and the Secretariat of Transportation and Communications of Mexico (SCT).)
Fire and Explosion Hazard: Negligible fire hazard when exposed to heat or flame.
Hazardous Combustion Products: Thermal decomposition may release toxic/hazardous gases.
Special Protective Equipment and Precautions for Fire-Fighters: Wear NIOSH/MSHA approved self-contained breathing apparatus, flame and chemical resistant clothing, hats, boots, and gloves. Move container from fire area if you can do it without risk. Cool container with water from maximum distance.
Contact local, state, or Department of Energy radiological response team. Avoid breathing dusts and fumes, keep upwind. Delay cleanup until instructions are received from Radiation Authority. Keep unnecessary people out of area until it is declared safe by proper authorities.


Personal Precautions and Protective Equipment: Do not touch damaged containers or spilled material. Damage to outer container may not affect primary inner container.
Emergency Procedures/Methods and Materials for Containment and Clean-up: Inform facility safety personnel. Untrained personnel should not touch damaged containers or spilled material. Undamaged packages may be moved to a radiologically controlled area for monitoring and decontamination, if necessary. Small spills may be cleaned up using a HEPA filtered vacuum cleaner. Large spills may be settled by sprinkling with water and diked for later disposal. Stay upwind; keep unnecessary people away. Delay clean up until arrival or instruction of qualified Radiation Authority.


Precautions for Safe Handling: Avoid contact with skin, eyes and clothing. When using do not eat, drink or smoke. Avoid breathing dust. Wash thoroughly after handling. Use only with adequate ventilation.
The route of entry of UO2 into the body which is potentially most serious, and is also most likely if exposure is accidental, is through inhalation.
Facilities, which use radioactive materials such as uranium, must examine their operations for occupational hazards including chemical toxicity, radiation exposure, and radioactive contamination. Operations which have the potential for producing airborne particulate or powdered uranium materials must be conducted only in HEPA filtered fume hoods or HEPA filtered glove boxes and monitored by CAAM or personal sampler as appropriate. When airborne contamination is possible, personnel in the airborne contamination area must be provided with appropriate protective gear including eye protection and respirators with high-efficiency particulate filters or self-contained air supply.
Facilities and laboratories, which use or handle uranium materials must develop safety emergency and accident response procedures. Personnel who work with radioactive materials must pass appropriate training in handling procedures. Trained radiation safety personnel must be on call during all procedures, which have the potential for harm to personnel or facility assets.
Uranium is a radioactive material, which decays primarily by emission of alpha particles and gamma radiation. Beta radiation is emitted by uranium decay products, which are present in most uranium materials. Alpha particles are not highly penetrating; the outer skin layer protects internal tissues from damage due to an external source of alpha particles. However, alpha radiation can be extremely dangerous to cells immediately adjacent to the source of radiation. Therefore, extreme care should be taken to avoid inhalation, ingestion, or contact with an open wound or sore. Facilities which handle uranium must evaluate the potential for harmful exposure to radiation and shield workers to comply with ALARA (As Low As Reasonably Achievable) requirements.
Care should be taken to prevent accidental ingestion of uranium materials. Protective clothing, including lab coats or disposable coveralls and safety glasses or goggles, must be worn. When operations are such that splashing, splattering, or other types of contamination may occur, users should wear disposable gloves and shoe covers. Solids and solutions should not be allowed to contact eyes, skin or clothing.
Personnel who could become contaminated by uranium materials should wash and monitor their hands before touching their face, personal clothing, eyeglasses, pens, laboratory notebooks, or laboratory instruments or equipment. Surfaces, which could become contaminated, must be cleaned and monitored for radioactive contamination on a regular basis. Personnel should not eat, drink, smoke, chew gum, apply cosmetics, or perform any other action which could lead to inhalation or ingestion of radioactive materials while within a room or area in which such materials have been stored or used.
VENTILATION: When working with dry powders, provide process enclosure ventilation. Depending upon the specific workplace activity and the radioactivity of the isotope, a more stringent ventilation system may be necessary to comply with exposure limits set forth by law (10 CFR 20.103).
RESPIRATOR: Follow the recommendations given in the NIOSH Pocket Guide to Chemical Hazards (U.S. Department of Health and Human Services, available through the U.S. Government Printing Office); NIOSH criteria documents or 29 CFR 1910 Subpart Z (U.S. Department of Labor).
The specific respirator selected must be based on contamination levels found in the work place, must not exceed the working limits of the respirator and be jointly approved by the National Institute for Occupational Safety and Health and the Mine Safety and Health Administration (NIOSH/MSHA).
FOR FIREFIGHTING AND OTHER IMMEDIATELY DANGEROUS TO LIFE OR HEALTH CONDITIONS: Use a self-contained breathing apparatus that has a full facepiece respirator with a high-efficiency particulate filter. Alternatively, use a supplied-air respirator with a full facepiece and operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained breathing apparatus.
Conditions for Safe Storage: Store in radioactive materials area. Keep storage container tightly closed. Store separately from incompatible materials. Observe all Federal, State, and local regulations when storing this substance.


Exposure Limits:
Uranium, insoluble compounds (As U):
0.05 mg/m3 OSHA TWA;
0.2 mg/m3 ACGIH TWA; 0.6 mg/m3 ACGIH STEL
0.2 mg/m3 NIOSH Recommended TWA; 0.6 mg/m3 NIOSH Recommended STEL
Occupational exposure to radioactive substances must adhere to standards established by the Occupational Safety and Health Administration, 29 CFR 1910.96, and/or the Nuclear Regulatory Commission, 10 CFR Part 20. For DOE and its contractors 10 CFR 835, Occupational Radiation Protection must be followed.


Appearance: Brown to copper-red to black crystalline powder or solid.
Odor: N/A
Odor Threshold: N/A
pH: N/A
Molecular Weight: 270.03
Molecular Formula: UO2
Melting Point: 5176-5248°F (2858-2898°C)
Specific Gravity: 10.96
Water Solubility: Insoluble
Solvent Solubility: Soluble in nitric acid and concentrated sulfuric acid. Insoluble in dilute acids.
Chemical Family: metal oxide, radioactive.
Vapor Density: Data not available
Vapor Pressure: Data not available
Auto-Ignition Temperature: Data not available
Decomposition Temperature: Data not available
Viscosity: Data not available
Relative Density: Data not available
Flammability: Data not available
Explosive Limits: Data not available
Boiling point: decomposes
Flash Point: Non-Flammable solid
Freezing Point: N/A
The half-lives of the various uranium isotopes are as follows:
233U = 1.54 X 105 y; 234U = 2.47 X 105 y; 235U = 7.04 X 108 y; 236U = 2.39 X 107; 238U = 4.51 X 109 y.
The specific activities of the various uranium isotopes are as follows:
233U = 3.6 X 102 MBq/g (9.7 X 10-3 Ci/g)
234U = 2.3 X 102 MBq/g (6.2 X 10-3Ci/g)
235U = 7.8 X 10-2 MBq/g (2.1 X 10-6Ci/g)
236U = 2.3 MBq/g (6.3 X 10-5 Ci/g)
238U = 1.2 X 10-2 MBq/g (3.3 X 10-7 Ci/g)
See 10 CFR Chapter 1, Pt. 71, Appendix A.


Reactivity: See below.
Chemical Stability: Stable under normal temperatures and pressures except for radioactive disintegration.
Polymerization: Hazardous polymerization has not been reported to occur under normal temperature and pressure.
Conditions to Avoid: Excessive heat.
Incompatible Materials: Bromine Trifluoride: Rapid reaction below 135°C.
Hazardous Decomposition Products: Thermal decomposition may release hazardous and toxic gases.


OVERVIEW: Uranium oxide is a brown to copper-red to black solid. Inhalation, ingestion, or absorption through skin abrasions may lead to heavy metal toxicity or radiation poisoning. Avoid inhalation or contact with skin, eyes and clothing. Wash thoroughly after handling. Use only with adequate ventilation.
Short Term Exposure: Inhalation of uranium powders may irritate the respiratory system. Exposure may cause irreversible kidney damage or acute necrotic arterial lesions. Inhalation of large particles of uranium materials or chronic exposure to uranium powders may result in radiation damage to internal tissues, especially the lungs and bones; the likelihood and extent of radiation damage increases with higher uranium enrichments.
Long Term Effects: In addition to effects from short term exposure, damage may include pulmonary fibrosis and malignant pulmonary neoplasia, anemia and blood disorders, liver damage, bone effects, sterility, and cancers.
Short Term Exposure: Contact with uranium powders may result in dermatitis. Contact with uranium solutions may allow absorption of uranium through the skin.
Long Term Effects: See Short Term Exposure.
Short Term Exposure: Uranium powders and particulate matter may cause redness and swelling of the eyes and eye damage.
Long Term Effects: Exposure to radiation may cause cataracts.
Short Term Exposure: Exposure may cause kidney damage or acute necrotic arterial lesions. May also affect the liver. Chronic exposures may cause radiation damage to internal tissues. The likelihood and extent of damage increases with higher enrichments and longer exposure periods.
Long Term Effects: Same effects as short-term exposure.


Environmental Impact Rating (0-4): No data available
Acute Aquatic Toxicity: No data available
Degradability: No data available
Log Bioconcentration Factor (BCF): No data available
Log Octanol/water partition coefficient: No data available


Observe all Federal, State and local Regulations when disposing of this substance.


The U.S. Department of Transportation (D.O.T.) Code of Federal Regulations (49 CFR Parts 100-185), the International Air Transportation Association (IATA), International Civil Aviation Organization (ICAO) and International Maritime Organization (IMDG) are all factored into the classification and transport of material.
Proper Shipping Name, Hazard Class, UN/ID Number, Special Information, Packing Group: To be determined on a case by case basis.
Classification of substances with multiple hazards must be determined in accordance with the criteria presented in the above mentioned regulations. Due to the various quantities/combinations of materials being shipped at one time, the information above must be determined based on the characteristics of the specific shipment.


CERCLA SECTION 103 (40 CFR 302.4): N
SARA SECTION 302 (40 CFR 355.30): N
SARA SECTION 304 (40 CFR 355.40): N
SARA SECTION 313 (40 CFR 372.65): N


Safety Data Sheet according to Regulation (EC) No. 1907/2006 (REACH). 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 with regard to appropriate safety precautions. It does not represent any guarantee of the properties of the product. American Elements shall not be held liable for any damage resulting from handling or from contact with the above product. See reverse side of invoice or packing slip for additional terms and conditions of sale. COPYRIGHT 1997-2016 AMERICAN ELEMENTS. LICENSED GRANTED TO MAKE UNLIMITED PAPER COPIES FOR INTERNAL USE ONLY.


Oxide IonAmerican Elements specializes in producing spray dry and non-spray dry high purity Uranium Oxide Powder with the smallest possible average grain sizes for use in preparation of pressed and bonded sputtering targets and in Chemical Vapor Deposition (CVD) and Physical Vapor Deposition (PVD) processes including Thermal and Electron Beam (E-Beam) Evaporation, Low Temperature Organic Evaporation, Atomic Layer Deposition (ALD), Metallic-Organic and Chemical Vapor Deposition (MOCVD). Powders are also useful in any application where high surface areas are desired such as water treatment and in fuel cell and solar applications. Nanoparticles also produce very high surface areas.High Purity (99.999%) Uranium Oxide (UO) Powder Our standard powder particle sizes average in the range of - 325 mesh, - 100 mesh, 10-50 microns and submicron (< 1 micron) and our spray dried powder with binder provides an extremely narrow particle size distribution (PSD) for use in thermal and plasma spray guns and other coating applications. We can also provide many materials in the nanoscale range. Materials are produced using crystallization, solid state and other ultra high purification processes such as sublimation. American Elements specializes in producing custom compositions for commercial and research applications and for new proprietary technologies. American Elements also casts any of the rare earth metals and most other advanced materials into rod, bar, or plate form, as well as other machined shapes and through other processes such as nanoparticles and in the form of solutions and organometallics. We also produce Uranium Oxide as pellets, pieces, tablets, and sputtering target. Oxide compounds are not conductive to electricity. However, certain perovskite structured oxides are electronically conductive finding application in the cathode of solid oxide fuel cells and oxygen generation systems. Other shapes are available by request.



Chemical Identifiers

Linear Formula UO
CAS 12035-97-1
Pubchem CID N/A
MDL Number N/A
EC No. 215-700-3
Beilstein Registry No. N/A
InchI Identifier InChI=1S/3O.U

Packaging Specifications

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Shipping documentation includes a Certificate of Analysis and Safety Data Sheet (SDS). Solutions are packaged in polypropylene, plastic or glass jars up to palletized 440 gallon liquid totes, and 36,000 lb. tanker trucks.

Related Products & Element Information

See more Uranium products. Uranium (atomic symbol: U, atomic number: 92) is a Block F, Group 3, Period 7 element. The number of electrons in each of Uranium's shells is 2, 8, 18, 32, 21, 9, 2 and its electronic configuration is [Rn] 5f3 6d1 7s2. In its elemental form uranium's CAS number is 7440-61-1. The uranium atom has a radius of 138.5.pm and its Van der Waals radius is 186.pm. Uranium is harmful both through its radioactivity and chemical toxicity. Uranium in its depleted and unenriched forms has numerous commercial applications due to its great density and its bright yellow-green color in glass and ceramics. Uranium Bohr ModelIts great density has found military applications in armor piercing armaments and in protective shielding. It is added to ceramic frits, glazes and to color bars for glass production because of its bright yellow shade. Uranyl Nitrate and Uranyl Acetate are used in medical and analytical laboratories. Uranium was discovered by Martin Heinrich Klaproth. The name Uranium originates from the planet Uranus. Uranium occurs naturally in soil, rock and water and is commercially extracted from uranium-bearing minerals.

Recent Research

Magnetic graphene based nanocomposite for uranium scavenging., El-Maghrabi, Heba H., Abdelmaged Shaimaa M., Nada Amr A., Zahran Fouad, El-Wahab Saad Abd, Yahea Dena, Hussein G M., and Atrees M S. , J Hazard Mater, 2017 Jan 15, Volume 322, Issue Pt B, p.370-379, (2017)

Redox Roll-Front Mobilization of Geogenic Uranium by Nitrate Input into Aquifers: Risks for Groundwater Resources., van Berk, Wolfgang, and Fu Yunjiao , Environ Sci Technol, 2017 Jan 03, Volume 51, Issue 1, p.337-345, (2017)

Determination of Krypton Diffusion Coefficients in Uranium Dioxide Using Atomic Scale Calculations., Vathonne, Emerson, Andersson David A., Freyss Michel, Perriot Romain, Cooper Michael W. D., Stanek Christopher R., and Bertolus Marjorie , Inorg Chem, 2017 Jan 03, Volume 56, Issue 1, p.125-137, (2017)

What Is the Actual Local Crystalline Structure of Uranium Dioxide, UO2? A New Perspective for the Most Used Nuclear Fuel., Desgranges, L, Ma Y, Garcia Ph, Baldinozzi G, Simeone D, and Fischer H E. , Inorg Chem, 2017 Jan 03, Volume 56, Issue 1, p.321-326, (2017)

Recovery of uranium(vi) from aqueous solutions using a modified honeycomb-like porous carbon material., Zhu, Jiahui, Liu Qi, Li Zhanshuang, Liu Jingyuan, Zhang Hongsen, Li Rumin, Wang Jun, and Emelchenko G A. , Dalton Trans, 2017 Jan 03, Volume 46, Issue 2, p.420-429, (2017)

Mortality in a combined cohort of uranium enrichment workers., Yiin, James H., Anderson Jeri L., Daniels Robert D., Bertke Stephen J., Fleming Donald A., Tollerud David J., Tseng Chih-Yu, Chen Pi-Hsueh, and Waters Kathleen M. , Am J Ind Med, 2017 Jan, Volume 60, Issue 1, p.96-108, (2017)

The dissolved uranium concentration and (234)U/(238)U activity ratio in groundwaters from spas of southeastern Brazil., Bonotto, Daniel Marcos , J Environ Radioact, 2017 Jan, Volume 166, Issue Pt 1, p.142-151, (2017)

The U.S. Department of Veterans' Affairs depleted uranium exposed cohort at 25 Years: Longitudinal surveillance results., McDiarmid, Melissa A., Gaitens Joanna M., Hines Stella, Condon Marian, Roth Tracy, Oliver Marc, Gucer Patricia, Brown Lawrence, Centeno Jose A., Dux Moira, et al. , Environ Res, 2017 Jan, Volume 152, p.175-184, (2017)

The role of sediment properties and solution pH in the adsorption of uranium(VI) to freshwater sediments., Crawford, Sarah E., Lofts Stephen, and Liber Karsten , Environ Pollut, 2017 Jan, Volume 220, Issue Pt B, p.873-881, (2017)

Plutonium, (137)Cs and uranium isotopes in Mongolian surface soils., Hirose, K, Kikawada Y, Igarashi Y, Fujiwara H, Jugder D, Matsumoto Y, Oi T, and Nomura M , J Environ Radioact, 2017 Jan, Volume 166, Issue Pt 1, p.97-103, (2017)


January 21, 2017
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