PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Uranium | 7440-61-1 | 2979 |
18.00
15.01
11.01
4.08
7.01
11.00
4.09
4.07
2.00
7.11
|
|||||||||
| Formula | Synonyms | |||||||||||
| U | URANIUM METAL, PYROPHORIC, 238U ELEMENT, URANIO, MÉTALICO DE, PIROFÓRICO (DOT SPANISH), URANIUM I (238U), URANIUM METAL: URANIUM I, URANIUM MÉTALLIQUE, PYROPHORIQUE (DOT FRENCH), URANIUM, ISOTOPE OF MASS 238, URANIUM-238 | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 238.03 | S | 1135 | 4131 | 2052 | 19.1 |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.60 | 5.0 | 30 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.062 | 0.51 | 3.1 |
Technical Basis
A review of available sources identified exposure limits (IDLH, STELs, TWAs) for uranium. Data sources were selected according to the hierarchy listed in Table 3.1. The 1990 IDLH was selected as the TEEL-3. The TEEL-2 value was derived according to Table 3.5. The TLV-STEL was selected as the TEEL-1.
• PAC-1 = TEEL-1 = TLV-STEL (0.6 mg/m3)
• PAC-2 = TEEL-2 = TEEL-3/6
• PAC-3 = TEEL-3 = IDLH (1990, 30 mg/m3)
This review generated PAC values consistent with Rev. 29A*.
• PAC-1 = TEEL-1 = TLV-STEL (0.6 mg/m3)
• PAC-2 = TEEL-2 = TEEL-3/6
• PAC-3 = TEEL-3 = IDLH (1990, 30 mg/m3)
This review generated PAC values consistent with Rev. 29A*.
References
Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/23989
IDLH: https://www.cdc.gov/niosh/idlh/7440611.html
Exposure limits: https://www.osha.gov/chemicaldata/544