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Selenium hexafluoride

Synonyms & Trade Names
Selenium fluoride
CAS No.
7783-79-1
RTECS No.
VS9450000
DOT ID & Guide
2194 125
Formula
SeF₆
Conversion
1 ppm = 7.89 mg/m3
IDLH
2 ppm
See: 7783791
Exposure Limits
NIOSH REL
TWA 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 Weight
193.0
Boiling Point
-30°F
Freezing Point
-59°F
Solubility
Insoluble
Vapor Pressure
>1 atm
Ionization Potential
?
Flash Point
NA
Upper Exposive Limit
NA
Lower Explosive Limit
NA
Relative Gas Density
6.66
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 concern
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 0947   MEDICAL TESTS: 0203

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