Chemical Safety Program: PACs for Chemicals of Concern

PAC Database - Detailed Chemical Data

Chemical Identity

Chemical	CAS#	UN#	Health Code Numbers
Uranium hexafluoride; (Uranium fluoride)	7783-81-5	2978	14.01 11.01 14.02 4.08 7.01 11.00 4.09 4.07 2.00 3.09
Formula	Synonyms
F6U	RADIOACTIVE MATERIAL, URANIUM HEXAFLUORIDE, NON-FISSILE OR FISSLE, HEXAFLUOROURANIUM, HEXAFLUORURE D^URANIUM, FAIBLE ACTIVITÉ SPÉCIFIQUE (DOT FREN, HEXAFLUORURE D'URANIUM, FISSILE EXCEPTÉ (DOT FRENCH), HEXAFLUORURE D'URANIUM, NON FISSILE (DOT FRENCH), HEXAFLUORURO DE URANIO DE BAJA ACTIVIDAD ESPECÍFICA (DOT SPA, HEXAFLUORURO DE URANIO, FISIONABLE EXCEPTUADO (DOT SPANISH), HEXAFLUORURO DE URANIO, MATERIAL RADIACTIVO, NO FISIONABLE O, HEXAFLUORURO DE URANIO, NO FISIONABLE (DOT SPANISH), MATIÈRE RADIOACTIVE, HEXAFLUORURE D'URANIUM, NON FISSILE OU, URANIUM FLUORIDE (238UF6), URANIUM FLUORIDE (U2F12), URANIUM FLUORIDE (UF6), URANIUM HEXAFLUORIDE, URANIUM HEXAFLUORIDE, FISSILE EXCEPTED, URANIUM HEXAFLUORIDE, LOW SPECIFIC ACTIVITY, URANIUM HEXAFLUORIDE, NON-FISSILE, URANIUM HEXAFLUORIDE-238U, URANIUM(VI) FLUORIDE, URANIUM-238 HEXAFLUORIDE

Physical Properties

Mol Wt	State	MP (°C)	BP (°C)	VP (Hg)	VP (°C)	SG	LEL (ppm)
352.02	S			115	25	5.09

PAC Values

PAC Values (Original Units: mg/m3)
PAC-1	PAC-2	PAC-3
3.6	9.6	36

Converted PAC Values (ppm)
PAC-1	PAC-2	PAC-3
0.25	0.67	2.5

Technical Basis

A review of available sources identified AEGLs for this chemical. The AEGLs were selected due to their priority among Protective Action Criteria (Section 1).
• PAC-1 = AEGL-1
• PAC-2 = AEGL-2
• PAC-3 = AEGL-3
This review generated PAC values that are consistent with Rev. 29A*.

References

Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/Uranium-hexafluoride

AEGLs (Table 5-1) and chemical information (Table 5-2) retrieved from: https://www.epa.gov/aegl/uranium-hexafluoride-results-aegl-program

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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.