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Selenium hexafluoride																				Related Pages
Synonyms & Trade Names
			Selenium fluoride
CAS No.
			7783-79-1
	RTECS No.
			VS9450000
	DOT ID & Guide
			2194 125

FormulaSeF6
	Conversion
			1 ppm = 7.89 mg/m3
	IDLH
			2 ppmSee: 7783791

Exposure Limits
			NIOSH RELTWA 0.05 ppm
					OSHA PEL TWA 0.05 ppm (0.4 mg/m3)
	Measurement Methods
			None available 
					
					See: NMAM or OSHA Methods
										
Physical Description
			Colorless gas.													
										
Molecular Weight193.0	
	Boiling Point-30°F
	Freezing Point-59°F
	SolubilityInsoluble
	Vapor Pressure>1 atm
	Ionization Potential?											
Flash PointNA
	Upper Explosive LimitNA
	Lower Explosive LimitNA
	Relative Gas Density6.66
Nonflammable Gas
Incompatibilities & Reactivities
			Water
					[Note: Hydrolyzes very slowly in cold water.]
Exposure Routes
			inhalation
Symptoms
			In Animals: pulmonary irritation, edema
Target Organs
			respiratory system
										
Personal Protection/Sanitation
			(See protection codes) **Skin:**No recommendation
							**Eyes:**No recommendation
							**Wash skin:**No recommendation
							**Remove:**No recommendation
							**Change:**No recommendation
	First Aid
			(See procedures)**Breathing:**Respiratory support
Respirator Recommendations
			**NIOSH/OSHA****Up to 0.5 ppm**: (APF = 10) Any supplied-air respirator**Up to 1.25 ppm**: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode**Up to 2 ppm**: (APF = 50) Any supplied-air respirator that has a tight-fitting facepiece and is operated in a continuous-flow mode(APF = 50) Any self-contained breathing apparatus with a full facepiece(APF = 50) Any supplied-air respirator with a full facepiece**Emergency or planned entry into unknown concentrations or IDLH conditions:** (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 (gas mask) with a chin-style, front- or back-mounted canister providing protection against the compound of concernAny appropriate escape-type, self-contained breathing apparatus
				Important additional information about respirator selection
See also
			INTRODUCTION
					  ICSC CARD: 0947
					  MEDICAL TESTS: 0203

			
							

			Page last reviewed:  October 30, 2019						Content
							source: 	National Institute for Occupational Safety and Health NIOSH Pocket Guide to Chemical Hazards
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Appendices
A – NIOSH Potential Occupational Carcinogens
B – Thirteen OSHA-Regulated Carcinogens
C – Supplementary Exposure Limits
D – Substances with No Established RELs
E – OSHA Respirator Requirements for Selected Chemicals
F – Miscellaneous Notes
G – 1989 Air Contaminants Update Project: Exposure Limits NOT in Effect
Type C & CE – Definitions for Type C and Type CE Respirators
Personal Protection and Sanitation Codes
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