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Uranium (insoluble compounds, as U)

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Synonyms & Trade Names
Uranium I, Uranium metal
CAS No.
7440-61-1 (metal)
RTECS No.
YR3490000 (metal)
DOT ID & Guide
2979 162(metal, pyrophoric)
Formula
U (metal)
Conversion
IDLH
Ca [10 mg/m3 (as U)]
See: 7440611
Exposure Limits
NIOSH REL
Ca TWA 0.2 mg/m3 ST 0.6 mg/m3 See Appendix A
OSHA PEL
TWA 0.25 mg/m3 See Appendix G
Measurement Methods
None available
See: NMAM or OSHA Methods
Physical Description
Metal: Silver-white, malleable, ductile, lustrous solid. [Note: Weakly radioactive.]
Molecular Weight
238.0
Boiling Point
6895°F
Melting Point
2097°F
Solubility
Insoluble
Vapor Pressure
0 mmHg (approx)
Ionization Potential
NA
Specific Gravity
19.05 (metal)
Flash Point
NA
Upper Explosive Limit
NA
Lower Explosive Limit
NA
Minimum Explosive Concentration
60 g/m3
Metal: Combustible Solid, especially turnings and powder.
Incompatibilities & Reactivities
Carbon dioxide, carbon tetrachloride, nitric acid, fluorine [Note: Complete coverage of uranium metal scrap with oil is essential for prevention of fire.]
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
dermatitis; kidney damage; blood changes; ; In Animals: lung, lymph node damage; Potential for cancer is a result of alpha-emitting properties & radioactive decay products (e.g., radon). [potential occupational carcinogen]
Target Organs
Skin, kidneys, bone marrow, lymphatic system
Cancer Site
[lung cancer]
Personal Protection/Sanitation
(See protection codes)
Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:When contaminated/Daily
Remove:When wet or contaminated
Change:Daily
Provide:Eyewash
First Aid
(See procedures)
Eye:Irrigate immediately
Skin:Soap wash promptly
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

NIOSH

At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus

Escape:


(APF = 50) Any air-purifying, full-facepiece respirator with an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters. 


Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 1251   MEDICAL TESTS: 0239
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health