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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.
MW:
193.0
BP:
-30°F
FRZ:
-59°F
Sol:
Insoluble
VP:
>1 atm
IP:
?
Fl.P:
NA
UEL:
NA
LEL:
NA
RGasD:
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   See ICSC CARD: 0947   See MEDICAL TESTS: 0203
 

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