Uranium oxide

  • Triuranium octaoxide
  • Uranyl uranate
  • C.I. 77919
Formula
U3O8
Structure
Description
green-black orthorhombic crystals

Registry Numbers and Inventories.
CAS
1344-59-8
EC (EINECS/ELINCS)
215-702-4
RTECS
YR4900000
RTECS class
Other
UN (DOT)
2909
Beilstein/Gmelin
44637 (G)
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed

Properties.
Formula
O8U3
Formula mass
842.00
Decomposition point, °C
1300
Density
7.193 g/cm3 (15 C)

Hazards and Protection.
Storage
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/cylinders from physical damage.
Handling
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/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.

Fire.
Fire fighting
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).
Fire potential
May burn but does not ignite readily.

Health.
Exposure effects
   Ingestion
See Inhalation.
   Inhalation
Minimal risk if packaging remains intact. Package damage can result in a measurable release of radiation but the risk is still low.
   Skin
See Inhalation.
   Eyes
See Inhalation.

First aid
 
   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.
   Inhalation
Apply artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult. See Ingestion.
   Skin
Immediately flush with running water for at least 20 minutes. See Ingestion.
   Eyes
Immediately flush with running water for at least 20 minutes. See Ingestion.

Transport.
UN number
2909
Response guide
Hazard class
7
USCG CHRIS Code
RAD