Uranyl acetate

  • Uranium acetate
  • bis(Aceto-O)dioxouranium
  • bis(Acetato-O)dioxouranium
Formula
UO2(C2H3O2)2
Structure
Description
Yellow crystals with a slight odor of vinegar.
Uses
Reagent for precipitation of sodium, in dry copying inks & as activator in bacterial oxidation processes.

Registry Numbers and Inventories.
CAS
541-09-3
EC (EINECS/ELINCS)
208-767-5
RTECS
YR3675000
RTECS class
Other
UN (DOT)
9180
Merck
12,9998
Beilstein/Gmelin
3940695
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C4H6O6U
Formula mass
388.12
Melting point, °C
110
Decomposition point, °C
275
Density
2.89 g/cm3 (20 C)
Solubility in water
Soluble

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. Dike to collect large liquid spills. Cover powder spill with plastic sheet or tarp to minimize spreading.
Stability
No data.
Incompatibilities
Reacts weakly as an acid.

Fire.
Fire fighting
Presence of radioactive material will not influence the fire control processes and should not influence selection of techniques. Move containers from fire area if you can do it without risk. Do not move damaged packages; move undamaged packages out of fire zone. SMALL FIRES: Dry chemical, carbon dioxide, water spray or regular foam. LARGE FIRES: Water spray, fog (flooding amounts). Dike fire-control water for later disposal.
Fire potential
Material itself does not burn or burns with difficulty.
Hazards
Some of these materials may burn, but most do not ignite readily. Uranium and Thorium metal cuttings may ignite spontaneously if exposed to air. Extremely flammable; will ignite itself if exposed to air. Burns rapidly, releasing dense, white, irritating fumes. Substance may be transported in a molten form. May re-ignite after fire is extinguished. Nitrates are oxidizers and may ignite other combustibles. May explode from heat or contamination. Some may burn rapidly. Some will react explosively with hydrocarbons (fuels). May ignite combustibles (wood, paper, oil, clothing, etc.). Containers may explode when heated. Runoff may create fire or explosion hazard.

Health.
Exposure limit(s)
OSHA PEL: 0.05 mg/m3
Exposure effects
Supralethal radiation doses may result in headache, acute brain syndrome, alterations in mental status including coma, and (rarely) seizures within minutes of exposure. Prenatal ionizing radiation exposure may cause congenital anomalies, mental retardation, and an increased incidence of seizures.
   Ingestion
Gastrointestinal syndrome (nausea/vomiting) commonly occurs after doses of 9 to 20 gy and may occur following doses as low as 5 gy. Initial vomiting is followed by persistent diarrhea, which may be bloody.
   Inhalation
Pulmonary radiation injury may result in radiation pneumonitis and radiation pulmonary fibrosis.
   Skin
Thermonuclear burns may occur. If erythema is produced by a penetrating radiation, serious systemic injury is certain.
   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
Monitoring exposed patients for contamination and decontamination procedures should be started. All personnel involved in handling patients should wear disposable protective clothing. The patient should be completely undressed and given a soap and water bath or shower (if the patient's condition permits and if the facility exists). Acute inhalation of radionuclides presents some difficult problems.
   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
9180
Response guide
Hazard class
9
USCG CHRIS Code
URA