PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Uranyl nitrate (yellow salt) 36478-76-9 2981
18.00
15.02
7.00
4.02
4.09
4.06
4.07
4.13
2.00
10.00
Formula Synonyms
N2O8U URANYL NITRATE, SOLID, DINITRATODIOXOURANIUM, NITRATE D^URANYLE, SOLIDE (DOT FRENCH), NITRATO DE URANILO, SÓLIDO (DOT SPANISH), URANIUM DINITRATE DIOXIDE, URANIUM NITRATE, URANIUM NITRATE OXIDE (U(NO3)2O2), URANIUM NITRATE OXIDE (UO2(NO3)2), URANIUM, BIS(NITRATO-O)DIOXO-, (T-4)-, URANIUM, BIS(NITRATO-O,O')DIOXO-, (OC-6-11)-, URANIUM, DINITRATODIOXO-, URANYL DINITRATE, URANYL NITRATE, URANYL NITRATE (UO2(NO3)2)
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
394.02 S 60.2 118 2.807
PAC Values
PAC Values (Original Units: mg/m3)
PAC-1 PAC-2 PAC-3
0.99 5.5 33
Converted PAC Values (ppm)
PAC-1 PAC-2 PAC-3
0.061 0.34 2.0
Technical Basis
A review of available sources identified exposure limits for soluble uranium (CASRN: 7440-61-1): TLV-STEL and IDLH. Data sources were selected according to the hierarchy listed in Table 3.1. Both exposure limits were adjusted with compound adjustment factors. The molecular weight adjusted IDLH was selected as the TEEL-3. TEEL-2 values were calculated according to Table 3.5. This molecular weight adjust TLV-STEL was selected as the TEEL-1.
• TEEL-1 = MW-adjusted TLV-STEL (Uranium, CASRN: 7440-61-1, 0.6 mg/m3)
• TEEL-2 = TEEL-3/6
• TEEL-3 = IDLH (1990; Uranium, CASRN: 7440-61-1, 20 mg/m3)
This review generated TEEL values that are consistent with Rev. 29A*.
References
https://www.cdc.gov/niosh/idlh/uranium.html
https://www.osha.gov/chemicaldata/545
https://cameochemicals.noaa.gov/chemical/12954
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PAC values marked with a subscript "A" correspond to 60-minute AEGL values.
PAC values marked with a subscript "E" correspond to ERPG values.
PAC values marked by * are >= 10% lower explosive limit (LEL) but < 50% LEL.
PAC values marked by ** are > 50% LEL but < 100% LEL.
PAC values marked by *** are >= LEL.